Mummy

While many cultures practice mummification for benign reasons, undead mummies are created through grueling rituals, typically to provide eternally vigilant guardians. Much more rarely, a body mummified without those special rites can rise again due to its hatred of the living.

Mummy Guardian (Creature 6), Mummy Pharaoh (Creature 9), Radiant Veranallia (Creature 20)

Few faiths support mummification as a means of creating the undead. Certain Iroransects practice self-mummification, for example, and worshippers of the ancient Osirian god Set left behind many mummies in that empire's lands.