The marilith, &, is a demon in NetHack. They can deal damage extremely quickly, because they possess six attacks per move; mariliths have two weapon attacks and four 2d4 claw attacks. Mariliths do not wield two weapons; rather, the two attacks are performed with its primary weapon, and followed by the claw attacks.
Like most demons, it is normally only generated in Gehennom, but is also a valid form for polymorphing, usually from polymorph traps; thus, it may be seen in other branches of the dungeon. Mariliths are also eligible for gating by other major demons.
Mariliths are interesting as pets or even as a self-polymorph target, since theirr primary weapon could be highly enchanted and/or a powerful artifact weapon. As an intelligent demon, a pet marilith will not wield a silver weapon or a cross-aligned artifact.
Mariliths originate from Dungeons and Dragons. Unlike their NetHack counterparts, D&D mariliths can wield six weapons simultaneously.
The marilith has a torso shaped like that of a human female,
and the lower body of a great snake. It has multiple arms,
and can freely attack with all of them. Since it is
intelligent enough to use weapons, this means it can cause