Java Edition 1.21.11, named Mounts of Mayhem, is a game drop for Java Edition, released on December 9, 2025. This is the last version to use the classic 1.x.y version format.

Additions

Items

• Nautilus Armor
  • A new armor type comes with copper, iron, gold, diamond, and netherite variants.
  • Can be obtained in buried treasure chests.
  • Can be equipped on a tamed nautilus or zombie nautilus.
• Spear
  • A new melee weapon comes with wooden, stone, copper, iron, gold, diamond, and netherite variants.
  • Has the same crafting recipe as shovel's, but in a diagonal form.
  • Has two types of attacks: charge and jab.
  • The faster the player moves while charging, the more damage will be done to an entity.
  • Has first appeared in Minecraft Dungeons and as an add-on in A Minecraft Movie: Add-on.
• Netherite Horse Armor
  • Can be obtained by upgrading a diamond horse armor with a netherite upgrade smithing template and a netherite ingot in the smithing table.
• Nautilus Spawn Egg
  • Can be used to summon nautiluses.
• Zombie Nautilus Spawn Egg
  • Can be used to summon zombie nautiluses.
• Camel Husk Spawn Egg
  • Can be used to summon camel husks.
• Parched Spawn Egg
  • Can be used to summon parcheds.

Mobs

• Nautilus
  • A new tamable mob that spawns rarely in the deep ocean, close to shipwrecks, and sea grasses.
  • Can be tamed with pufferfish, then any type of fish bucket afterwards.
  • Like any ridable mobs, it can be ridden on using a saddle.
    • Can also be removed using shears.
  • Gives a new effect "Breath of the Nautilus" when ridden on, which freezes the oxygen bar.
  • Might have a chance of spawning as a baby.
  • Atrracts drowned.
• Zombie Nautilus
  • A new neutral undead mob variant of a nautilus.
  • Can be ridden on by a drowned, forming a zombie nautilus jockey.
  • Like any ridable mobs, it can be ridden on using a saddle.
    • Can also be removed using shears.
  • Gives a new effect "Breath of the Nautilus" when ridden on, which freezes the oxygen bar.
  • Like any undead mobs:
    • Are damaged by Instant Health and healed by Instant Damage.
    • Are not affected by Regeneration and Poison.
    • Take extra damage from Smite enchantment.
    • Burns in sunlight (when on land).
    • Are not targeted by the wither.
    • Causes an armadillo to hide in its shell.
• Zombie Nautilus Jockey
  • A new hostile jockey consists of a drowned riding a zombie nautilus.
• Camel Husk
  • A new tamable undead passive mob that spawns in deserts.
  • Can be tamed by killing a husk or parched riding it.
  • Like any ridable mobs, it can be ridden on using a saddle.
    • Can also be removed using shears.
  • Like any undead mobs:
    • Are damaged by Instant Health and healed by Instant Damage.
    • Are not affected by Regeneration and Poison.
    • Take extra damage from Smite enchantment.
    • Are not targeted by the wither.
    • Causes an armadillo to hide in its shell.
• Parched
  • A new undead hostile skeleton variant that spawns in deserts.
  • It wields bow and shoot players with an arrow, inflicting weakness when hit.
  • Like any undead mobs:
    • Are damaged by Instant Health and healed by Instant Damage.
    • Are not affected by Regeneration and Poison.
    • Take extra damage from Smite enchantment.
    • Are not targeted by the wither.
    • Causes an armadillo to hide in its shell.
  • Like husks, parcheds do not burn in sunlight.
• Coral Zombie Nautilus
  • A new variant of zombie nautilus that spawns in warm oceans.

Effects

• Breath of the Nautilus
  • A new status effect given on a player when riding a nautilus or zombie nautilus.
  • Freezes the oxygen bar, preventing a player from drowning.

Enchantments

• Lunge
  • A new enchantment that is only exclusive to spears.
  • Has 3 levels.
  • It only works when using a jab attack.
  • Like any enchantments, it can be used using an anvil, through enchanting table, or by /enchant command.

Advancements

• Mob Kabob
  • Requires hitting 5 mobs with the same charge attack using a spear.

Changes

Gameplay

• Menu
  • Changed the panorama to show nautilus, zombie nautilus with a drowned rider, husk and parched riding a camel husk, and zombie horsemen at night.

Mobs

• Skeleton Horses
  • Now burns in sunlight like other undead mobs does.
    • Was later fixed in 25w42a.
• Zombie Horses
  • Changed its texture.
  • Now spawns naturally in the following biomes:
    • Plains
    • Savanna
  • Spawns with a zombie riding on it, forming a zombie horseman.
  • Now burns in sunlight like other undead mobs does.
  • Can now wear horse armor.
• Horses and other equines
  • No longer sink in water while being ridden by a player.