Into the dark. Don't make a sound.
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THE DEEP DARK BIOME
A vast underground biome blanketed in glowing sculk, found only deep below Y=0. The only place Ancient Cities generate — massive buried structures with incredible loot, including the exclusive Swift Sneak enchantment and echo shards.
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SCULK — THE NERVOUS SYSTEM
Sculk Sensors detect vibrations and emit redstone. Sculk Shriekers count activations — 3 total triggers summons the Warden. Wool blocks absorb vibrations entirely. Bring them every time.
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THE WARDEN
Do NOT fight this. 500 HP, detects through walls by sound and smell, kills through full Netherite armour in two hits. It is designed to be avoided. Sneak. Use wool. Throw projectiles to distract it. Leave quietly.
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MANGROVE SWAMP
A gorgeous biome with towering mangrove trees whose roots hang above water. Mud blocks pack into mud bricks — a warm-toned building material. Completely distinct from regular swamps.
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FROGS & FROGLIGHTS
Three variants by biome temperature: Temperate (orange), Cold (green), Warm (white). Frogs eat slimes and magma cubes, dropping Froglights — glowing decorative blocks in matching colours, unobtainable any other way.
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THE ALLAY
A fairy-like mob that collects items for you. Give it an item, and it searches nearby for matching ones, delivering them to a Note Block it's dancing near. Perfect for auto-collecting farm drops. Duplicates with Amethyst Shards while dancing.
DEEP DARK TIP
Always sneak. Stuff wool into corridors before walking through. If a Shrieker goes off, freeze. If the Warden appears — don't fight, don't sprint — sneak slowly away. Three total Shrieker activations summon it, not per-visit.