A new era of mounts, weapons, and mayhem hits Minecraft as Mojang drops its latest update, bringing a wave of undead cavalry, deep-sea creatures, and a brand new weapon.

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With 1.21.11, Mojang has introduced the Mounts of Mayhem update. New mobs, weapons, mechanics, and world behaviour. Following earlier 2025 drops, this update shifts the spotlight onto traversal and combat, giving players more ways to move and fight. We took a deep dive into every confirmed feature to break down exactly what’s arriving in this chaotic new chapter.

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What Is Mounts of Mayhem?

Mounts of Mayhem is the fourth Minecraft game update of 2025, following The Spring to Life (25 March 2025), Chase the Skies (17 June 2025), The Copper Age (30 September 2025).

This drop focuses entirely on mounts, riders, and mobility upgrades. It introduces new creatures across multiple biomes. It finally adds a way to get the classic zombie horse in survival, a brand-new weapon class, and refreshes how players navigate land and sea. Everything is designed around dynamic movement. There’s jousting with spears, diving into oceans on undead nautili, or thundering through deserts beside skeletal raiders.

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The Spear: Minecraft’s New Combat Style

Minecraft gets a new weapon: the spear, available in all main material tiers.

• Works with two attack modes: Jab for fast melee, and Charge for mounted or sprinting attacks.
• Introduces a fresh combat rhythm focused on spacing and momentum.
• Paired with a new enchantment, Lunge, which adds mobility at the cost of hunger.
  

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Undead Riders of the Desert

Camel Husks

A new undead camel-like mount found in deserts and badlands.

• Typically spawns with a rider.
  
• Can be tamed once the rider is dealt with.
  
• Behaves like other undead mobs (Smite-vulnerable, burns in sunlight on land).
  

Parched

A new skeleton variant for hot biomes.

• Uses a bow that inflicts Weakness.
• Often rides camel husks alongside spear-wielding husks.
• Does not burn in daylight.
  

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The Nautilus Rises

Nautilus

A brand-new aquatic mount found in deep oceans.

• Tamed with pufferfish, then mountable with a saddle.
  Grants the Breath of the Nautilus effect, freezing the oxygen bar so players do not drown while riding.
• Attracts drowned naturally.
  

Zombie Nautilus & Coral Zombie Nautilus

Undead variants appearing in regular and warm oceans.

• Can spawn with drowned jockeys riding them.
• Tamable once the rider dismounts.
• Behave as undead: burn in sunlight on land, react to Smite, etc.

Zombie Horses Return From the Dead

Long requested and now fully supported:

• Zombie horses spawn naturally in plains and savanna as part of new rider encounters.
• Can be tamed after unseating the rider.
• Can wear all tiers of horse armor, including the new netherite variant.
• Count as undead and burn in sunlight.

Mount Armor Overhaul

Two major additions expand mount customisation:

• Nautilus Armor – copper, iron, gold, diamond, and netherite variants.
• Netherite Horse Armor – now craftable via a smithing upgrade, making it the strongest armor for horses and zombie horses.
  

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How Gameplay Will Change

Mounts of Mayhem provides a lot of different ways to move around in the game.

• Spears transform both foot combat and mounted combat.
• Horses can now swim, making rivers and lakes far easier to cross.
• Underwater travel with mounts thanks to the nautilus family.
• Desert biomes become more dangerous with parched riders and undead cavalry.
  
• A lot of new ‘jocky’s’ were added giving mob collection players additions for their zoo’s.

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Full Feature Breakdown 

New Weapon

• Spear (all tiers)
• Lunge enchantment (3 levels)
  

New Mounts & Mobs

• Nautilus
• Zombie Nautilus
• Coral Zombie Nautilus
• Camel Husk
• Parched
• Zombie Horse (expanded features & natural spawns)
  

New Effects

• Breath of the Nautilus
  

Mount Armor

• Nautilus armour (copper → netherite)
  Netherite horse armour (craftable)
  

Major Mechanics

• Horses can swim
  New jockey encounters across deserts and oceans
• Undead mob rules applied consistently to new mounts
  

Technical Additions

• Updated data pack version
• Updated resource pack version
• Item component updates
• Item tag updates
• Entity texture updates
• Entity model updates
• Bug fixes and behaviour tweaks
  

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Final Thoughts

This drop adds a fair amount of new features, mobs and mechanics. There are more ways to traverse terrain now, along with mob-collecting opportunities and interaction for players (jousting.) Ever since the announcement that Mojang was releasing drops instead of slower updates, a lot has been added into the game.