This idea came from a Reddit post and an awesome description from Reddit user /u/fareven.
The Ashen Monk:
An order of monks cremate their dead. Some of their master monks have the ability to animate the ashes their bodies have been reduced to, and act as deathless guardians for the order’s sacred places. If their funerary urns are disturbed they swirl forth as a whirlwind of grey dust, dust that continually forms and reforms into a manlike shape that seems to only be solid while delivering flurries of furious blows. Instinct: Guard the orders sacred places
I created it in the Dungeon World Codex.