Bestiary

Bestiary

Fifty creatures live in the ten worlds, five per world, one of them an elite. This page lists their stats and the behavior the code actually gives them (MatrioMob.java). The design descriptions from tools/content.py show up as in-game tooltips; where the code does less, the table says so.

On top of the behavior below, every creature fights with three or four attacks of its own: see Creature attacks.

Common rules

• Stats are final values: the world multipliers are already included (see Difficulty formulas).
• Attack speed: a melee creature attacks every max(6, 20 / (1 + 0.06 x (world - 1))) ticks.
• Speed: 0.26 by default, 0.33 for swarms and lurers, 0.30 for fleeing, charging and sound-hunting creatures, 0 for Snare Flowers, Eyeless Watchers and mimics.
• Elites have 6 armor and 60% knockback resistance (others 2 and 10%), always drop their resource (1 or 2), give 5 souls when you kill them and never despawn. They give 20 experience, others 6.
• Drops: regular creatures drop their common resource 60% of the time. A rare drop, when listed, has a 15% chance (5% for the Terrain Heart). World 1 creatures also drop Roots 25% of the time.
• Nesting creatures split into two smaller copies when they die (60% size, 40% health, 30% faster). The copies do not split again and drop nothing.
• Hidden creatures (Root Creeper, Living Lock, Crawling Block, Mimic) stay invisible until you get within 3.5 blocks or hit them.
• Spawning: natural spawns use the monster category of each world's biome, with weight 60 for swarms (groups of 2 to 4), 40 for regular creatures (1 to 3) and 10 for elites (alone). Combat structures add spawners of the world's regular creatures.
• World 2 creatures and Ash Titanids are fire immune. Flying creatures take no fall damage.
• Variants and cycles: a calm world has fewer and weaker creatures, a wild or cursed one more and stronger ones with richer drops, a hallowed one slightly fewer creatures and richer drops (see World variants); every New Cycle adds +50% health and +25% damage (see Endings and the New Cycle).

World 1: Toxic Jungle

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Sporeling	16	3	-	Fast (speed 0.33). Each hit adds 5 toxin.	Spores (60%), Roots (25%)
Root Creeper	24	4	-	Invisible and still until you come within 3.5 blocks, then reveals itself and roots you (Slowness VI, 3 s).	Roots (60%), Roots (25%)
Snare Flower	30	5	-	Never moves. Every 3 s, if it sees you within 14 blocks, yanks you toward it.	Spores (60%), seed_rare (15%, item does not exist: never drops), Roots (25%)
Spore Bearer	20	3	-	Drops a poison cloud (radius 2.5, Poison I) every 2.5 s and runs away when you get within 5 blocks.	Spores (60%), Roots (25%)
Chitin Guard	40	6	elite	Hits from the front only deal 25% damage. Strike it from behind.	Chitin (100%, 1-2), Roots (25%)

World 2: Giant Veins

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Ash Miner	30	6	-	Every 1.5 s breaks soft blocks (hardness under 3) in front of it to reach you.	Ash Ingot (60%)
Living Vein	49	6	nesting	Plain melee attacker. Nesting: on death splits into 2 smaller copies (60% size, 40% health, 30% faster) that drop nothing.	Giant Ore (60%)
Rock Salamander	27	7.2	-	Fire immune. Each hit adds 6 heat.	Blazing Rock (60%)
Dead Smith	40	7.2	-	Every 4 s dashes at you from up to 16 blocks.	Ash Ingot (60%)
Slag Golem	61	8.4	elite	Takes only 60% damage unless it is on fire or standing in lava.	Blazing Rock (100%, 1-2)

World 3: Endless Dungeon

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Jailer	51	7.2	-	Every 10 s rings a bell and sets every idle Matriochka creature within 24 blocks on you.	Dungeon Key (60%)
Sentinel	55	7.2	-	Every 2.5 s, with line of sight within 20 blocks, chains you for 60% of its damage and Slowness III (2 s).	Sealed Fragment (60%)
Living Lock	44	5.8	-	Invisible and motionless until you come within 3.5 blocks. Does not walk after revealing itself.	Dungeon Key (60%)
Dungeon Rat	18	4.3	-	Fast (speed 0.33) and spawns in packs of 2 to 4.	Sealed Fragment (60%)
Executioner	82	11.5	elite	Dashes at you every 4 s and, every 10 s when you are within 3 blocks, cages you in iron bars.	Sealed Fragment (100%, 1-2)

World 4: Storm Archipelago

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Wind Ray	44	8.6	flying	Flies 4 blocks above you, swoops in and knocks you back hard (2.5) on hit.	Ray Membrane (60%)
Storm Bird	39	8.6	flying	Hovers above you and periodically dives to strike.	Storm Essence (60%)
Island Warden	98	10.4	-	Every 4.5 s, when you are within 6 blocks, slams the ground: full damage and a launch to everything within 4 blocks.	Celestial Crystal (60%)
Cloud Mine	34	12.1	flying	Floats toward you and explodes (power 2.2, no block damage) when close.	Storm Essence (60%)
Sky Harpooner	59	8.6	elite		Celestial Crystal (100%, 1-2)

World 5: Lightless Deep

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Blind Prowler	86	14.5	-	Cannot pick a sneaking player as a target. Speed 0.30.	Shadow Shard (60%)
Glow Devourer	73	8.3	-	Every 2 s breaks torches, soul torches and lanterns within 4 blocks, and gives you Darkness (5 s) within 8 blocks.	Shadow Shard (60%)
Echo	53	10.4	-	Every 6 s plays a player-hurt sound to lure you.	Diamond Fragment (60%)
Eyeless Watcher	100	12.4	-	Frozen while you sneak or stand still. Moves and strikes as soon as you move normally.	Diamond Fragment (60%)
Shadow Mother	146	14.5	elite, nesting	Plain melee attacker. Nesting: on death splits into 2 smaller copies (60% size, 40% health, 30% faster) that drop nothing.	Shadow Shard (100%, 1-2)

World 6: Upside Realm

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Reflection	90	14.9	-	When you hit it, its attack damage becomes the damage you just dealt (never lower than its base).	Inverted Crystal (60%)
Ceiling Walker	117	12.4	-	Climbs walls when it bumps into them.	Unstable Alloy (60%)
Unstable Sphere	63	19.9	flying	Drifts toward you. On death, gives Levitation II (3 s) to every player within 6 blocks.	Unstable Alloy (60%)
Inverted Strider	135	14.9	-	Plain melee attacker.	Inverted Crystal (60%)
Broken Mirror	179	17.4	elite, nesting	Returns 30% of the damage it takes to the attacker. Nesting: on death splits into 2 smaller copies (60% size, 40% health, 30% faster) that drop nothing.	Inverted Crystal (100%, 1-2)

World 7: Pressure Ocean

Every creature of World 7 swims, never drowns and spawns in open water.

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Abyssal Hunter	157	20.9	aquatic	Swims straight at you.	Abyssal Salt (60%)
Blade School	73	11.9	aquatic	Fast swimmer. Drains 3 breath per second when within 3 blocks.	Abyssal Salt (60%)
Pressure Jelly	121	14.9	aquatic	Within 7 blocks: Slowness II, Mining Fatigue II and -2 breath per second.	Pressure Pearl (60%)
Bell Crab	242	17.9	aquatic, nesting	Plain melee attacker. Nesting: on death splits into 2 smaller copies (60% size, 40% health, 30% faster) that drop nothing.	Pressure Pearl (60%)
Trench Eel	182	23.9	elite, aquatic	Every 3.5 s at close range: Slowness VII (2.5 s) and Wither I (2 s).	Pressure Pearl (100%, 1-2)

World 7 wildlife

Harmless creatures fill the sea. They never attack.

Creature	Health	Behavior	Drops
Lantern Shoal	6	A school of tiny glowing fish that darts away from swimmers.	Raw Cod
Glow Jelly	8	A small jellyfish that drifts slowly and lights the deep.	Glow Ink Sac

World 8: Hastened Seasons

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Seasonal Creature	180	21.5	-	Every 5 s within 5 blocks applies the season's effect: spring Poison, summer Weakness, autumn Slowness, winter Hunger.	Season Fragment (60%)
Hourglass Elder	245	17.9	-	Within 7 blocks: Slowness II and Mining Fatigue II.	Temporal Sand (60%)
Dusk Shade	196	25.1	-	Plain melee attacker.	Temporal Sand (60%)
Child of Minutes	114	14.3	-	Every 5 s grows by 10% (up to 1.8x) and its damage rises by 8%.	Season Fragment (60%)
Hour Keeper	368	28.7	elite	Every 5 s within 5 blocks applies the season's effect: spring Poison, summer Weakness, autumn Slowness, winter Hunger.	Temporal Sand (100%, 1-2)

World 9: Restless Ground

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Crawling Block	331	25.8	-	Invisible and motionless until you come within 3.5 blocks. Does not walk after revealing itself.	Terrain Fragment (60%)
Mimic	287	30.1	-	Invisible and motionless until you come within 3.5 blocks. Does not walk after revealing itself.	Terrain Fragment (60%)
Foundation Eater	309	21.5	-	Every 1.25 s eats the block under it (hardness under 5) unless a Terrain Anchor is within 6 blocks.	Terrain Fragment (60%)
Earth Hand	265	34.4	-	Every 3.5 s at close range: Slowness VII (2.5 s) and Wither I (2 s).	Terrain Fragment (60%)
Walking Column	496	34.4	elite, nesting	Every 4.5 s, when you are within 6 blocks, slams the ground: full damage and a launch to everything within 4 blocks. Nesting: on death splits into 2 smaller copies (60% size, 40% health, 30% faster) that drop nothing.	Terrain Fragment (100%, 1-2), Terrain Heart (5%)

World 10: The Giant Workshop

Creature	Health	Damage	Traits	Behavior (as coded)	Drops
Giant Sporeling	447	36.1	-	Splits into 3 Sporelings when it dies.	Artisan's Thread (60%)
Ash Titanid	536	31	-	Fire immune. Each hit adds 6 heat.	Artisan's Thread (60%)
Colossal Jailer	596	36.1	-	Every 10 s rings a bell and sets every idle Matriochka creature within 24 blocks on you.	Artisan's Thread (60%)
Titan Ray	417	41.3	flying	Flies 4 blocks above you, swoops in and knocks you back hard (2.5) on hit.	Artisan's Thread (60%)
Colossus Prowler	745	41.3	elite	Cannot pick a sneaking player as a target. Speed 0.30.	Artisan's Shard (100%, 1-2)