When a paladin that falls from grace dies without seeking atonement, dark powers can transform the once-mortal knight into a hateful undead creature. A death knight is a skeletal warrior clad in fearsome plate armor. Beneath its helmet, one can see the knight’s skull with malevolent pinpoints of light burning in its eye sockets.     Eldritch Power. The death knight retains the ability to cast divine spells. However, no death knight can use its magic to heal. A death knight also attracts and commands lesser undead, although death knights that serve powerful fiends might have fiendish followers instead. Death knights often use warhorse skeletons and nightmares as mounts.   Immortal Until Redeemed. A death knight can arise anew even after it has been destroyed. Only when it atones for a life of wickedness or finds redemption can it finally escape its undead purgatory and truly perish.   Undead Nature. A death knight doesn’t require air, food, drink, or sleep.