Dripstone Caves

Stone teeth, top and bottom. Dripstone caves fill with pointed dripstone and dripstone blocks, in clusters small enough to walk into and columns thick enough to block a tunnel.

A stalactite with water above it drips into a cauldron and fills it, slowly and for free, and lava does the same. A stalactite over your head falls when the block above breaks, and a stalagmite under a drop does more damage than the fall would. Copper turns up here in large veins. Zombies, skeletons, spiders, creepers and drowned use the dark like any other cave.

On paper the climate is warm and humid, temperature 0.8 against 0.4 humidity with rainfall rather than snow, though nothing falls this deep. minecraft:dripstone_caves is an uncommon underground biome added in 1.18, and 1.21 still bores it out.

Another Overworld biome you meet from below. Lush Caves and underground cave systems share its edges, and daylight reaches none of them.

It generates underground anywhere; you will recognise it by the forests of pointed dripstone stalactites and stalagmites.

Uncommon underground, which makes the search a cave system rather than a compass heading. Pointed dripstone falls the moment the block above it goes, so mine the walls here and leave the ceiling alone. No portal is needed for it, and its usual neighbours are those same tunnels, so you cross one while travelling underground for other reasons nearly every time you dig a long shaft.

Five hostiles, one list, and every one of them on the same 1 in 6 of a spawn attempt in fours: zombie, skeleton, spider, creeper and drowned. No animal is listed for the biome at all.

That evenness is the problem. A zombie bangs on doors and burns in daylight that never reaches down here; a skeleton fires arrows and would burn in sunlight if it had any; a spider climbs the walls and turns neutral in daylight, which underground it never does; a creeper explodes when it gets close and drops gunpowder, or a music disc if a skeleton finishes it instead of you; and the drowned in the water pools carries a trident and nautilus shells.

Light the floor before you admire the dripstone, because all five spawn at the same rate whatever the ceiling looks like. Per attempt the drowned is a sixth of the hostile spawns, four at a time, then spider a sixth and creeper a sixth. Nothing here is friendly, the drowned is an underwater zombie, sometimes wielding a trident in the pools, and night makes no difference underground because the players are the only light source. A drowned in the pools will wield a trident if it has one.

Drowned

Zombie

Skeleton

Spider

Creeper

Pointed Dripstone and Dripstone Block, two blocks and no third, and both grow here and in no other biome. The pointed kind is the only block in the game that makes a stalactite drip: put one under water and it fills a cauldron, put one under lava and it fills it with lava instead.

Large ore blobs, especially copper and iron, generate more often in dripstone caves, and the extra copper here is laid in as its own oversized veins on top of the ordinary ones. That makes this the cave to mine if you want copper by the shulker rather than by the stack.

The dripstone comes in three passes: single points, clusters on the floor and ceiling, and the tall columns that meet in the middle, which is why the same cave can look like teeth in one chamber and pillars in the next.

In terms of mining the whole cave gives you more than it looks like it should, and nothing else underground hands over copper at this rate; you get it in the chamber you are standing in.

Pointed Dripstone hanging above and Dripstone Block underfoot is the entire dripstone list of the game, and both of them are here.

Pointed Dripstone

Dripstone Block

Pointed dripstone and no floor plan. Nothing belongs to dripstone caves the way a hut belongs to a swamp, so the stalactites overhead, the stalagmites underfoot and the dripstone clusters between them are what exploring rewards.

The structures that do turn up belong to the world rather than to the biome: mineshaft tunnels running through the dripstone, dungeon rooms cut beside them, and a stronghold in rare cases. Watch the ceiling while you walk, since a stalactite dropped from above hurts far more than the fall it comes with. Exploring is rewarded in scenery rather than buildings, since the dungeons and mineshafts dug through the stone, an occasional stronghold with them, were generated by placement that ignores biome boundaries. Generation put them beneath the biome, tied to no cave and no biome above it, which is why such stone is as hard to read as any cave gets.

Everything here happens underground and it happens a lot. A dripstone cluster gets between 48 and 96 tries per chunk, pointed dripstone between 192 and 256, and large dripstone between 10 and 48. Copper gets its own extra pass at 16 tries, which no other biome runs. Forty eight passes in total, and the surface above them is the plains list: 0.05 trees per chunk, flowers on one chunk in 32.

The dripstone caves carry no animal variant rules whatsoever: no temperature class, no rabbit or fox rule, nothing about frogs. Drowned in the water pools are the only mob the biome spawns.

It is on the stronghold list, which is worth remembering when your eye of ender leads you into a cave rather than over it.

The dripstone caves have no structure of their own either, and the mineshafts that cross them are the ordinary kind rather than a cave version.

The chambers underneath keep to the same band as everywhere, between y -40 and y -20, with their spawn lists emptied inside.