Undead
Undead in NetHack are a group of unliving monsters. They include the following monster classes:
Common traits
Undead monsters are represented internally by the monster attribute M2_UNDEAD. Undead take an extra d4 of damage from blessed items, and vampires and shades take an extra d20 from silver weapons. Drinking holy water also harms them, including the player if polymorphed into an undead form; however, unholy water actually exercises constitution. Undead deal double damage in the hour of midnight.
Priests and knights can turn undead, which can scare undead or destroy low-level ones completely. A wand of undead turning or spell of turn undead can also damage and scare them.
Undead are immune to level drain, such as from the Staff of Aesculapius. They are also all immune to cold (except vampires), sleep, poison, and death rays.
Reading the Book of the Dead while cursed will summon hostile undead. The blessed book will pacify them, and tame them whenever possible if you are chaotic. If nothing else helps, the Sunsword does double damage against undead.
Undead and garlic
All undead dislike garlic and will avoid it where they can.
