Eda, Sinister Ogbengii

Eda, Sinister Ogbengii's power is equal to
the number of Spirits in your graveyard.
{2}{b}: Regenerate Eda. Each time Eda returns to
the battlefield after being regenerated, put an
additional +1/+1 counter on Eda and create
a 0/1 black Spirit creature token with flying.
The ogbengii were evil spirits who plagued the Igbe tribe
by masquerading as children, then dying too soon on
purpose, to feed on grief.