Monsters

They wait under the blocks, ready to rise when you dig them free. Released monsters march on your torches, buildings and campfire. Your weapon's tier must match the monster's tier to hurt it.

MonsterHPDamageSpeedWeapon neededLootWhere
Slime31/s1.1Fists or better2× Slime GelEverywhere; the first monster you meet
Skeleton62/s1.5Stone Sword3× BoneFar from camp on the surface; common underground
Demon123/s1.3Iron Sword1× Demon Horn, 3× GoldThe far surface at night; the deep underground
Spider102/s1.8Stone Sword6× FiberDepth 2 and below
Zombie41/s0.9Fists or better1× Bone, 2× ClothNight swarms from the very first night; they never come alone
Slime Monster92/s0.8Stone Sword5× Slime GelMid-surface and the depths; splits into Slimes when slain
Ghost43/s1.2Stone Sword2× EctoplasmBorn in the unexplored fog at night; drifts through everything; only vulnerable on your lit ground; gone by dawn

Night spawning

In the dark (night on the surface, always underground), monsters appear on revealed but unlit ground roughly every 5 seconds, up to 6 at once, plus 2 per depth level. Light denies spawns: torches, the campfire and buildings that glow all keep the dark honest.