Drain life or level drain refers to one of the following:
- the spellbook of drain life and the spell it confers
- the drain life attack of the artifacts Stormbringer and the Staff of Aesculapius and in SLASH'EM the additional artifact Thiefbane
- the drain life monster attack
- one possible effect of the seduction attack of an incubus or succubus
- a possible negative effect of prayer
- the SLASH'EM item, a wand of draining
- drain resistance, which protects against drain life attacks.
Losing a level
Life draining / level draining in NetHack is relatively complex. The spellbook/wand, the artifact weapons, and monsters all provide apparently-similar life draining, and every source has the same effect if used on the player, but each does a different amount of damage to monsters. In addition both NetHack itself and the NetHack community use inconsistent naming, making any combination of the words "level"/"life" and "drain" interchangeable. In addition, the level drain monster attack is affected by magic cancellation.