White unicorn is a type of monster in ADOM. They are hardy and evasive lawful creatures that frequently teleport and can quickly regenerate, and have a very strong melee attack. White unicorns are generally not hostile to lawful or neutral PCs, though like other monsters they will always be hostile if summoned or generated in tension rooms. Killing one will usually bring the PC's alignment down quite significantly (e.g. from N= to N-, or N- to NC); champions of law or balance thus should try to avoid killing them, sometimes even if it is in self-defense.