Eldritch Drifter

Whenever a creature dealt damage this turn
by this creature dies, exile it.
You may play cards exiled with this creature, and you may spend mana as though it were any type to cast them.
It aimlessly drifts along the outskirts of the forest all day.
Nobody knows how it got there or how long it’s been there.
Its said that all who hear it’s moan of agony for too long disappear.