Combat Expanded/Sandbox

Sandbox

Module Type	Stand Alone
Created by	Thanathor
Compatible MC Versions	1.19.2, 1.20+

This module adds custom modifiers to armor, weapons, and mobs as well as a ramping difficulty curve the longer you survive.

Features

Combat Expanded expands on the game's difficulty. Mobs will be given additional stats and gear scaling over time. This gear can be dropped for the player with special modifiers that alter the players stats and abilities.

Home Bed

Players can designate a bed as a "Home Bed" by sleeping in it. Only the last bed slept in by any player can be a Home Bed. While a player is online their Home Bed serves as a beacon that lowers difficulty in an area of 128 blocks around it. Only one Home Bed can affect an area at a time.

Mobs

As a player stays alive in the world for longer the mobs that spawn around them will grow in strength. Mobs will spawn with higher health, damage, movement speed and with better armor and weapons.

Mobs will also receive additional bonusses depending on what biome they spawn in.

Biome Modifiers Collapse

Biome	Modifier		Added Difficulty
Snowy Plains	Snowy		Low
Ice Spikes	Snowy		Low
Snowy Taiga	Growth	Snowy	Medium
Snowy Beach	Snowy		Low
Grove	Growth	Snowy	Medium
Snowy Slopes	Mountainous	Snowy	Medium
Jagged Peaks	Mountainous	Snowy	Medium
Frozen Peaks	Mountainous	Snowy	Medium
Windswept Hills	Mountainous		Low
Windswept Gravelly Hills	Mountainous		Low
Windswept Forest	Mountainous		Low
Taiga	Growth		Low
Old Growth Pine Taiga	Growth		Low
Old Growth Spruce Taiga	Growth		Low
Stony Shore	Mountainous		Low
Plains			None
Sunflower Plains	Flowering		Medium
Forest			None
Flower Forest	Flowering		Medium
Birch Forest			None
Old Growth Birch Forest			None
Dark Forest	Growth		Low
Swamp	Toxic		High
Mangrove Swamp	Toxic	Growth	Very High
Jungle	Toxic		High
Sparse Jungle			None
Bamboo Jungle	Toxic		High
Beach			None
Mushroom Fields
Cherry Grove	Flowering	Mountainous	High
Meadow	Mountainous		Low
Stony Peaks	Mountainous		Low
Desert	Burned		Medium
Savanna	Burned		Medium
Savanna Plateau	Burned		Medium
Windswept Savanna	Burned	Mountainous	High
Badlands	Burned		Medium
Wooded Badlands	Burned		Medium
Eroded Badlands	Burned	Mountainous	High
River			None
Frozen River	Snowy		Low
Warm Ocean	Reef		High
Lukewarm Ocean			None
Deep Lukewarm Ocean	Deep		Low
Ocean			None
Deep Ocean	Deep		Low
Cold Ocean			None
Deep Cold Ocean	Deep		Low
Frozen Ocean	Snowy		Low
Deep Frozen Ocean	Deep	Snowy	Low
Dripstone Caves			None
Lush Caves	Flowering		Medium
Deep Dark
The Void

Modifier Effects

Modifier	Effects
Dark	Mobs are stronger. You'll find more Zombies here. Creepers have a higher blast radius. Weapons and Armor have a reduced droprate.
Burned	Mobs are faster. Husks are weaker but spawn in large swarms. Creeper will explode faster. Higher chance of Fire Aspect and Flame enchantments.
Deep	Drowned are more powerful.
Flowering	Zombies have lower health but respawn when killed. Creepers are Invisible but with a lower blast radius. Slimes are larger and spawn more often.
Growth	Spiders will spawn in groups. Skeletons will spawn more often and use melee weapons. More Slimes will spawn. Higher chance of Projectile Protection enchantment.
Mountainous	Mobs are stronger. Phantoms will spawn. Spiders can spawn with Speed. Higher chance of Knockback and Punch enchantments.
Reef	Drowned are much more powerful and spawn with tridents more often. Drowned will spawn in groups with Guardians.
Snowy	Mobs are slower but healthier. Most attacks will apply Slowness.
Toxic	Mobs are weaker but apply Weakness, Hunger and Poison. Cave Spiders will spawn in groups.

Spawners

Mobs spawned from spawners do not benefit from any modifiers. Mobs are considered spawner spawns if they spawn in the air.

Blaze, Drowned, Slimes, Magma Cubes, Phantoms, Shulkers, Ghasts, Guardians, and Elder Guardians will gain modifiers even if spawned from a spawner.

Zombie Alternatives

• Zombie reinforcements will not drop their equipment.
• Baby zombies have -60% Max Health.
• Zombie Leaders are replaced with zombies that have highly increased stats and much better gear than ordinary zombies. In addition Zombie Leaders will be equipped with a shield enchanted with Unbreaking V. All of the equipment has a high chance of being dropped on death.

Phantoms

Phantoms will no longer spawn from insomnia. Instead they can be found above high mountains, unless a players Home Bed is nearby. Phantoms will take damage upon contact with water.

Item Modifiers

Custom armor and weapons are dropped at 8.5% and 20% respectively, scaling with looting. Any items dropped like this will be prefixed with a special modifier.

Weapons

Expand Possible Weapon Modifiers
Weapon	Passive Effects	On-Hit Effects	Rarity	Commonly found in
Light	-0.5-2.0 Attack Damage +0.6-0.9 Attack Speed		common	Burned Dark
Heavy	+0.5-2.0 Attack Damage -0.2-0.5 Attack Speed Knockback II/III Enchant		common	Mountainous Dark
Flaming	-0.5-2.0 Attack Damage Fire Aspect III/IV/V Enchant		common	Burned Dark Nether
Twofold	1 Attack Damage +100% Attack Damage		common	Nether
Giant	-0.6-0.9 Attack Speed	Deals damage dealt to all entities within 4.5 blocks	common	Snowy Deep / Reef
Venomous	-0.5-2.0 Attack Damage	Apply one of: Poison (0:08) Poison (0:30) Poison II (0:08)	common	Toxic Deep / Reef
Crippling	-0.2-0.5 Attack Speed	Apply Slowness I/II/III (0:04) and one of: Weakness (0:04) Blindness (0:04) Hunger III (0:04) Wither II (0:04)	common	Flowering Toxic
Piercing	-0.5-2.0 Attack Damage	Reduce Armor by 2/4/6 for 10 seconds, hitting an affected target again stacks the effect and refreshes the duration	common	Flowering Growth
Resonating	1 Attack Damage	Deal 6/8/12 additional damage that ignores armor and resistances 2 seconds after the hit. This effect cannot stack.	rare	Snowy Toxic
Swift	-0.6-0.9 Attack Speed	+0.1/0.2/0.3 Attack Speed on the sword for 6 seconds, the effect will stack up to 4 Attack Speed on repeated use.	rare	Burned Growth
Charged	1 Attack Damage	Apply 2 stacks of "Charge". Stacks will fall off every 0.5 seconds 8 seconds after the last one was applied. Applying a "Charge" to a target that already has 8 stacks will strike them with lightning after a delay. The struck target takes 30 extra lightning damage (10 for players)	rare	Mountainous Deep / Reef

Armor

ExpandPossible Armor Modifiers
Armour	Passive Effects	Activation	Active Effects	Rarity	Commonly Found in
Scouting		No damage taken for 4 seconds	+10-25% Movement Speed	common	Snowy Burned
Shielded		No damage taken for 4 seconds	Absorption I/II/III, additional pieces add their level to the total	common	Mountainous Deep / Reef Dark
		On taking damage	Lose Absorption
Sly		No damage taken for 4 seconds	Invisibility while sneaking. When no longer sneaking gain +25/50/75% Attack Speed for 4 seconds	common	Toxic Growth
Focused		No damage taken for 4 seconds	+1.5-5 Attack Damage	common	Mountainous Deep / Reef Nether
		Taken damage within 4 seconds	-0.5-2 Attack Damage
Reactive	-1-3 Armor	On taking damage	Absorption I/II/III (0:30), additional Reactive pieces stack the effects level Effect does not trigger when taking damage to yellow Absorption hearts and cannot trigger again during the 30 seconds duration	rare	Mountainous Dark
Coated	-1-3 Armor	On taking damage	Apply one of: Poison (0:06) Weakness (0:10) Instant Health to the attacker. Additional pieces will add one level of their respective effect.	common	Flowering Toxic
Rejuvenating	-1-4 Armor	On taking damage	Store 10/20/30% of damage taken	common	Snowy Dark Nether
		No damage taken for 4 seconds	Restore the stored health
Sparking		On taking damage	Apply a stack of "Charge". Stacks will fall off every 0.5 seconds 8 seconds after the last one was applied. Applying a "Charge" to a target that already has 8 stacks will strike them with lightning after a delay. The struck target takes 30 extra lightning damage (10 for players)	common	Mountainous
Devouring	+0.01-0.03 Attack Damage Enchanted with Curse of Vanishing	After killing an entity	Permanently increase this pieces Passive Effect by 0.01-0.03, up to 2.5-5 Attack Damage (addition and cap amounts are independent)	rare	Burned Growth
Satiated	+2.5-5 Attack Damage Loses Curse of Vanishing
Vampiric	-1-3 Armor	After killing an entity	Restore half a heart	common	Toxic Deep / Reef Dark
Totemic		After killing an entity	Call a totem that gives players within 12 blocks one of the following effects: Regeneration, Resistance, Speed, Strength Effects last 6 seconds, reapplied to players that remain in the totems range. Killing an entity within a totems range will add the effect to the totem instead, or if the totem already has that effect will apply a level II version of the effect for 6 seconds. Totems vanish when all players leave its range	rare	Mountainous Toxic
Draining		After killing an entity	+1 Max Health (Capped at +6/8/10)	common	Burned Flowering Growth
		On taking damage	-1 Max Health
Soothing		Health at/below 50% of max	Instant Health I/II/III within 2.75/4.5/6.25 blocks respectively Players receive one level lower instead Players within 6.5 blocks gain Regeneration V (0:02) Can only occur once per Minecraft day	rare	Flowering Dark Nether
Berserkers		Health at/below 50% of max	+0.5-2 Attack Damage +10-25% Attack Speed +5-20% Movement Speed +1 Knockback Resistance	common	Burned Flowering Growth
Fluxed	Positive and negative values are the same	Health at/below 50% of max	-0.5-2 Attack Damage, +1-3 Armor	common	Flowering Nether
		Health above 50% of max	+0.5-2 Attack Damage, -1-3 Armor
Vigorous		Health above 50% of max	Mining Fatigue /Poison /Weakness immunity, and Hunger /Blindness /Nausea /Wither immunity	rare	Snowy Toxic
Fractal	Resistance III	Health above 50% of max	Health gets set to half of Max Health	common	Flowering Deep / Reef Growth
Archery	-10-25% Attack Speed	Equipped	Shooting an arrow will instead spawn arrows equal to the 2 * the combined level of all Archery armour pieces. Multishot arrows will spawn half that each. Extra arrows copy the main arrows stats, with a slightly randomized trajectory and cannot be picked up.	common	Snowy Mountainous Burned
Canine	-10-25% Attack Speed	Equipped	Spawn an invulnerable wolf that deals 4 damage to aid the wearer. Commanding the wolf to sit will cause it to lose aggro Feeding the wolf will grant it strength for 60 seconds Additional Canine pieces will spawn more wolves if the wolf is named it will drop its nametag on despawning	rare	Snowy Growth
Radiant		Equipped	A constant floating light will follow the wearer. Crouching will cause the light to Glow and pulse with flashes of light.	common	Mountainous Burned Dark
Equestrian		Equipped	Mounts have Speed I/II/III and one of: Resistance II Jump Boost II Fire Resistance Regeneration Level of Speed stacks like enchantments, so two pieces with level III will result in level IV	common	Flowering Growth
Dashing	-5-20% Movement Speed	Equipped	Speed & Hunger ramping from level I to V every 12.5 seconds as long as the wearer keeps sprinting. Swimming keeps the current speed and hunger but doesn't ramp. Every additional Dashing piece reduces the time between levels by 50%	common	Burned Toxic
Hearty	Armor set to 0	Equipped	+ Max Health equal to the base armor of this piece	common	Snowy Toxic Deep / Reef
Psychic	-10-25% Attack Speed	Equipped	A sword will circle around you at 3.5 blocks distance, crouching will cause the sword to close in and spin faster. The material and damage of the sword is dependent on the armour material: Leather = Wooden Sword - 2 damage Chainmail = Stone Sword - 3 damage Iron / Gold = Iron / Gold Sword - 4 damage Diamond / Netherite = Diamond / Netherite Sword - 5 damage	rare	Burned Deep / Reef Nether
Wild Magic		On taking damage	Apply a random potion effect with a random duration to self. Wild Magic Table (Roll d100) Expand Roll Effect Possible Levels Possible Duration 1 Poison 1 - 3 2 - 8s 2 Wither 1 - 3 2 - 8s 3 Instant Health 1 - 10 - 4 Instant Damage 1 - 5 Levitation 1 - 10 1 - 5s 6 Slowness 1 - 10 30 - 90s 7 Haste 1 - 10 30 - 90s 8 Mining Fatigue 1 - 10 30 - 90s 9 Strength 1 - 10 30 - 90s 10 Jump Boost 1 - 10 30 - 90s 11 Nausea 1 - 10 30 - 90s 12 Regeneration 1 - 10 30 - 90s 13 Resistance 1 - 5 30 - 90s 14 Blindness 1 - 10 30 - 90s 15 Hunger 1 - 10 30 - 90s 16 Weakness 1 - 10 30 - 90s 17 Health Boost 1 - 10 30 - 90s 18 Absorption 1 - 10 30 - 90s 19 Saturation 1 - 10 30 - 90s 20 Darkness 1 - 10 30 - 90s 21-25 Speed 1 - 10 30 - 90s 26-30 Fire Resistance 1 - 10 30 - 90s 31-40 Water Breathing 1 - 10 30 - 90s 41-50 Night Vision 1 - 10 30 - 90s 51-60 Invisibility 1 - 10 30 - 90s 61-70 Glowing 1 - 10 30 - 90s 71-80 Slow Falling 1 - 10 30 - 90s 81-90 Conduit Power 1 - 10 30 - 90s 91-100 Dolphins Grace 1 - 10 30 - 90s	epic	Mushroom Fields
Vorpal	+1 Knockback Resist	On taking damage	Teleport to a random location within 8 blocks.	epic	The End
Unlinked		Linked	Only works after the armour piece has been renamed. Link to any other player wearing an Unlinked armour piece that has the same name. Health of all players in a link will always be the same.	epic	Deep Dark

Advancements

Advancement	Requirement
Hidden Power Obtain a Modified weapon or piece of armor from a mob	Pick up an item with a Modifier
Vwoops! Who thought this was a good idea?	Teleport using a piece of Vorpal armor

Technical Details

Player Difficulty

Each player has their own Player Difficulty, which is calculated every 5 minutes or on respawn.

Player Difficulty = Playtime * (1 - Death Multiplier) * World Difficulty, where

Playtime: goes up by 1 every 5 minutes a player is online, up to 100.

Death Multiplier: is calculated on death by: Death Multiplier = Death Multiplier * 0.75 + 0.2, every time difficulty is calculated it is reduced by 0.01 for every 5 minutes since the last death.

World Difficulty: is based on world difficulty: 0.3 for easy, 0.4 for medium and 0.5 for hard

Mob Difficulty

When a mob spawns it will be assigned a Mob Difficulty of its own to modify its stats.

Player Difficulty * Difficulty Modifier + Random Offset + Illager Bonus, where

Player Difficulty: Difficulty taken from the closest player

Difficulty Modifier: is calculated based on the environment where the mob spawned:

• Start with a random value between -0.1 - 0.1
• If it's raining: +0.2
• If the mob spawned on the surface and it is night time: +0.1 for crescent moon, +0.2 for quarter moon, +0.3 for gibbous moon or +0.4 for a full moon
• If mob spawned underground (Dark): +0.3
• If in Mountainous biomes: +0.2
• If an active Home Bed is within 128 blocks: -0.4

Random Offset: a random value between -5 and 5

Illager Bonus: applied to Illagers under certain conditions:

• Pillager patrol leaders: +10
• Pillager/Vindicator raider: +3*(raid wave)

A mobs Difficulty is then used to calculate their stats. Each mobs has their own Stat Page with Base and Caps for each stat. Each stat calculates its score by applying a normal distribution of the Base, then taking a percentage of that equal to the mobs Mob Difficulty. This score cannot exceed the Cap listed on the mobs Stat Page.

Finally the actual stat is calculated as follows:

Max Health = score * 1

Attack Damage = score * 0.5

Movement Speed = score * 0.02 (% multiply_base)

Armor = score * 1

Armor Toughness = score * 3

Mob Modifiers

If the chance for a modifier is underlined it scales up with Mob Difficulty, the displayed chance is for 100 Mob Difficulty, e.g. an 80% chance at 100 Mob Difficulty would be a 40% chance at 50 Mob Difficulty.

ExpandGeneral Mob Modifiers
Mob	Base Stats	Stat Page (Base / Cap)	Additional Effects
Zombie/Husk/Drowned	-3 Max Health -1.5 Attack Damage -4% Movement Speed	Max Health: 20 / 15 Attack Damage: 35 / 7 Movement Speed: 15 / 6 Armor: 10 / 4 Armor Toughness: 25 / 8	33% chance to equip a weapon 75% chance to equip armor (4x) 15% chance for +15% Movement Speed 40% chance for +45% Knockback Resistance
Skeleton/Stray	-5 Max Health -20% Movement Speed	Max Health: 30 / 12 Attack Damage: 24 / 9 Movement Speed: 12 / 10 Armor: 7 / 3 Armor Toughness: 5 / 2	75% chance to equip armor (4x) 10% chance for Power Enchantment 7.5% chance for Harming arrows
Spider	-6 Max Health -0.5 Attack Damage -6% Movement Speed	Max Health: 30 / 12 Attack Damage: 18 / 10 Movement Speed: 64 / 34 Armor: 4 / 2
Cave Spider	-8 Max Health -1.5 Attack Damage -12% Movement Speed	Max Health: 30 / 10 Attack Damage: 8 / 4 Movement Speed: 36 / 17
Creeper	-5 Max Health	Max Health: 30 / 12 Movement Speed: 20 / 8 Armor: 14 / 7
Slime / Magma Cube	-3 Max Health	Max Health: 30 / 10 Attack Damage: 8 / 3	35% chance to grow 1 size (up to 4) 10% chance to grow 1 size (up to 4)
Enderman	-2 Max Health -3 Attack Damage -10% Movement Speed	Max Health: 45 / 16 Attack Damage: 32 / 12 Movement Speed: 8 / 8 Armor: 26 / 9	in The End: +20% Attack Damage +15% Movement Speed
Phantom	-15 Max Health -1.5 Attack Damage	Max Health: 33 / 16 Attack Damage: 11 / 6 Armor: 8 / 5
Wither Skeleton	-2 Max Health -6 Attack Damage -4% Movement Speed +66% Knockback Resistance	Max Health: 34 / 14 Attack Damage: 26 / 14 Movement Speed: 6 / 6 Armor: 8 / 8 Armor Toughness: 14 / 8	100% chance to equip Iron or Chainmail armor (4x) 40% chance to equip a bow with Wither arrows
Piglin	-2 Max Health -0.5 Attack Damage -4% Movement Speed	Max Health: 80 / 24 Movement Speed: 18 / 8 Armor: 6 / 4 Armor Toughness: 6 / 2	33% chance to equip Gold armor (4x)
Zombified Piglin	-3 Max Health -1 Attack Damage -2% Movement Speed	Max Health: 65 / 24 Attack Damage: 17 / 7 Movement Speed: 20 / 10
Pillager	-4 Max Health -15% Movement Speed	Max Health: 32 / 10 Movement Speed: 15 / 12 Armor: 34 / 6 Armor Toughness: 12 / 5	If Patrol Leader: Piercing Enchantment If in Patrol: Movement Speed: 34 / 14 If in Raid Wave 4+: Max Health: 32 / 18 Armor: 34 / 12 If in Raid Wave 5/6/7/8: 20/40/60/80% chance of Piercing Enchantment
Vindicator	-2 Max Health -3 Attack Damage -10% Movement Speed	Max Health: 40 / 24 Attack Damage: 20 / 7 Movement Speed: 24 / 15 Armor: 36 / 15 Armor Toughness: 30 / 5	If in Raid Wave 4+: Max Health: 60 / 24 Armor Toughness: 30 / 12
Hoglin	-16 Max Health -14% Movement Speed	Max Health: 100 / 36 Attack Damage: 22 / 6 Movement Speed: 16 / 7 Armor: 24 / 6
Other		Max Health: 15 / 6 Attack Damage: 11 / 5 Movement Speed: 15 / 7 Armor: 7 / 4

ExpandBiome Specific Mob Modifiers (Overworld)
Biomes	Effects on any mob	Effects on Zombies/Husks/Drowned	Effects on Skeletons/Stray	Effects on Other Mobs
Dark	+15% Max Health +10% Attack Damage +5% Movement Speed Weapon droprate to 8.5% Armor droprate to 4.25%	+25% Reinforcement Chance 25% chance to spawn 1 extra Zombie	Movement Speed Base +2 Armor Toughness Base +2	Cave Spider: +15% Movement Speed Creeper: Explosion Radius set to 4 Spider: 10% chance of Invisibility
Burned Expand Desert Savanna Savanna Plateau Windswept Savanna Badlands Wooded Badlands Eroded Badlands	+10% Movement Speed 40% chance of Fire Aspect Enchantment 40% chance of Flame enchantment	Husk: -65% Max Health -25% Attack Damage 200% chance to spawn extra Husk (4x) 90% chance to spawn extra Husk (3x) 45% chance to spawn extra Husk (4x)		Cave Spider / Spider: 50% chance of Fire Resistance Creeper: Fuse reduced by 25% Phantom: Fire Resistance 35% chance to grow 1 size
Deep Expand Deep Lukewarm Ocean Deep Ocean Deep Cold Ocean Deep Frozen Ocean	+60% Armor Toughness	Drowned: +20% Attack Damage
Flowering Expand Sunflower Plains Flower Forest Cherry Grove Lush Caves		Head slot is replaced with a "Zombie Spore" that comes in 3 varieties: Cherry in Cherry Groves: grants 16 Max Health grants 2 Attack Damage Normal in other Flowering Biomes (66% chance) grants 8 Max Health grants -1.5 Attack Damage Flowering in other Flowering Biomes (33% chance) Each Spore also reduces the mobs Max Health by 25%. Killing a Spore Zombie will drop the Spore which will respawn a new Spore Zombie after 8 seconds. Every time a Spore respawns a Zombie the drop chance of its subsequent Spores drops by 10%. Setting Spore Zombies on fire destroys the Spore.	85% chance to be replaced with 3 zombies. In Lush Caves only 1 zombie spawns	Enderman: 50% chance to be replaced with a Slime Creeper: Invisible until it gets close to a player Phantom: 35% chance to grow 1 size 50% chance to grow 1 size Slime: 35% chance to grow 1 size (up to 4) 35% chance to grow 1 size (up to 4)
Growth Expand Snowy Taiga Grove Taiga Old Growth Pine Taiga Old Growth Spruce Taiga Dark Forest Mangrove Swamp	80% chance of Projectile Protection Enchantment	Replaced with 3 Skeletons	-25% Max Health +24% Movement Speed Spawns with melee weapons	Cave Spider / Spider: Spawn a second (Cave) Spider 60% chance to spawn a third Creeper: +20% Movement Speed Slime: Spawn additional small Slimes, 1 per size above 0
Mountainous Expand Snowy Slopes Jagged Peaks Frozen Peaks Windswept Hills Windswept Gravelly Hills Windswept Forest Stony Shores Cherry Grove Meadow Stony Peaks Windswept Savanna Eroded Badlands	+10% Attack Damage +50% Armor Toughness Mob Difficulty +20% 40% chance for Knockback Enchantment 35% chance for Punch Enchantment	40% chance to spawn a Phantom +1 Attack Knockback Max Health Base +6		Cave Spider / Spider: 40% chance of Speed Creeper: +40% Knockback Resistance
Reef Expand Warm Ocean	50% chance of depth strider enchantment	Drowned: +100% Movement Speed +10% Armor +75% Armor Toughness +2 Attack Damage 45% chance to spawn a Guardian, thrice 60% chance to spawn a Drowned, twice 40% chance to spawn with a Trident
Snowy Expand Snowy Plains Ice Spikes Snowy Taiga Snowy Beach Grove Snowy Slopes Jagged Peaks Frozen Peaks Frozen River Frozen Ocean Deep Frozen Ocean	-15% Movement Speed +15% Max Health	Attacks apply Slowness (0:15)	Stray: Slowness III (0:30) arrows	Cave Spider / Spider: Attacks apply Slowness (0:15) Creeper: +30% Max Health -10% Movement Speed Phantom: Attacks apply Slowness (0:15) Slime: Size +1 (up to 3)
Toxic Expand Swamp Mangrove Swamp Jungle Bamboo Jungle		Attacks apply Weakness and Hunger II (0:15)	Hunger II, Poison and Weakness (0:05) arrows	Cave Spider: attacks apply Hunger II and Weakness in addition to poison Creeper: Leaves a cloud of Weakness II, Blindness, Nausea and Hunger II Slime: Poison nearby entities on landing, effect scales with size Spider: spawn 3 Cave Spiders with -3 Max Health

ExpandBiome Specific Mob Modifiers (Nether)
Biome	Effect on Piglin	Effect on Zombified Piglin	Effect on Skeleton	Effect on Magma Cube	Effect on Enderman
Nether Wastes					95% chance to replace with Blaze
Soul Sand Valley			Fire Resistance		90% chance to replace with Wither Skeleton
Crimson Forest	Max Health Cap from 18 to 28	33% chance to spawn with Gold armor (4x)
Warped Forest			+35% Max Health -6% Movement Speed +3 Attack Damage spawn without bow		33% chance to replace with 3 Skeletons
Basalt Deltas				Size +1 (up to 3) +15% Attack Damage

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History

Version	Date	Change
1.19	22 Aug 2022	Released Combat Expanded
1.20	23 Sep 2023	Updated for 1.20 Module is no longer experimental
1.20.4	25 Jan 2024	Updated for 1.20.4 Introduced the Difficulty Update

Previous Versions

MC 1.20.2 Version

In the 1.20 version Difficulty was calculated in a much simpler way, ranging from 1-10, going up by one for every Minecraft day a player survived.

The 1.20.4 Difficulty Update reworked almost all of how mob stats were calculated to provide a smoother and slower increase in difficulty while making it easier to balance.

Unidentified items were also removed after this version, instead items are "identified" as soon as they drop..

MC 1.19 Version

Many Modifiers have been significantly changed or completely replaced since the original 1.19 version. As the 1.19 version of the module was an experimental version there is no easy upgrade path to 1.20.

The Focused, Berserkers, Poised, Reckless, Guarding, Merchants armor and Deliberate, Light, Ascended weapon Modifiers were removed in the 1.20 update, replaced by Fluxed, Poisonous, Fractal, Archery, Totemic, Equestrian for armor and Giant and Chiming for weapons.