In this pack, surface biomes no longer reach all the way down. Deep underground they give way to separate cave biomes: Frozen Caves, terracotta-filled Warm Caves and molten Inferno caverns.
Locating a cave biome
1. Press F3 and watch the biome line on the debug screen while you mine or explore caves. It tells you when you cross into a new cave biome.
2. Go deep. The surface biome above you does not decide what you find below, so a desert can sit over icy caverns.
3. Learn the visual cues:
- Frozen Caves are filled with ice and can be huge, with blue ice stalactites. Mineshafts can still cut through them.
- Warm Caves are lined with layers of terracotta.
- Inferno caverns hold molten lava pools and magma blocks.
Gearing up for each one
- Inferno: Carry Fire Resistance potions and a water bucket. Magma blocks damage you unless you sneak, so crouch when crossing them. Place blocks to bridge over lava pools.
- Frozen Caves: Ice is slippery, so watch your footing near drops. Bring a Silk Touch pickaxe if you want to keep the ice blocks instead of breaking them.
- Warm Caves: These are a strong source of terracotta for building. Any pickaxe mines it quickly.
Mark entrances with torches or signs so you can find each biome again. Note their coordinates from the F3 screen.