Mob Controller

With structures disabled, many mobs and items would not exist on FortressMC. MobController adds custom mob spawns and alternative drop tables so you can still get smithing templates, music discs, and other structure loot from mob kills.

See also Structure Alternatives for the full obtainability list.

Custom mob spawns

Natural mob spawns are sometimes replaced with structure-exclusive mobs:

Normally spawns	Can become	Where	Chance
Monsters at night	Breeze	Mountain peaks, Y > 100	50%
Piglin	Piglin brute	Nether wastes, crimson forest	10%
Strider	Blaze	Nether	75%
Skeleton	Wither skeleton	Soul sand valley	50%
Fish / squid	Guardian / elder	Deep ocean	25%
Enderman	Shulker	The End	5%
Enderman	Phantom	The End (elevated)	5%
Spider in caves	Cave spider	Below sea level, dark caves	100%

A nether datapack also adds wither skeleton spawns to Soul Sand Valley. Restart or /minecraft:reload after first install.

Smithing templates

Kill the mob as a player. Looting adds +0.1% per level.

Mob	Template	Chance
Elder guardian	Tide	20%
Warden	Ward / Silence	15% / 10%
Piglin brute	Netherite upgrade	0.4%
Hoglin	Snout	5%
Wither skeleton	Rib	6%
Breeze	Bolt	3%
Bogged	Flow	4%
Shulker	Spire	5%
Enderman	Eye	3%
Drowned	Coast	2.5%
Husk	Dune	2%
Witch	Wild	2%
Pillager	Sentry	2%
Evoker	Vex	5%

Music discs

Set up charged creeper kills (no player required):

Kill	Disc
Creeper → piglin brute	Pigstep
Creeper → breeze	Precipice
Creeper → bogged	Creator or Creator Music Box
Warden → creeper	Otherside

Other notable drops

Mob	Drop
Warden	Echo shard or disc fragment 5 (50/50)
Breeze	Heavy core (0.4% + Looting)
Ravager	Enchanted golden apple (1% + Looting)
Ender dragon	Dragon head (always)
Iron golem	Iron ingots removed

Chunk spawn cap

To limit spawn farms: 10 spawns per chunk per 60 minutes for natural and custom spawns. Spawner eggs and breeding are exempt.