"Dark Servants. Sinister necromantic magic infuses the remains of the dead, causing them to rise as zombies that do their creator’s bidding without fear or hesitation. ...
Most zombies are made from humanoid remains, though the flesh and bones of any formerly living creature can be imbued with a semblance of life. Necromantic magic, usually from spells, animates a zombie. ... The magic animating a zombie imbues it with evil, so left without purpose, it attacks any living creature it encounters."