Moragnus, the footmancer

Foot Devour (You may devour only Foot Tokens
under your control)
When Moragnus, the footmancer kills a creature,
put a 1/1 foot token into play.
When Moragnus the footmancer is killed
by a creature, turn that creature
into a 1/1 foot token

The dark side of feetmancy is a pathway to many abilities some consider to be... unnatural