Keeper of the Dread Canal

When Keeper of the Dread Canal enters the battlefield, create a 1/1 black Raven creature token with flying. Then if you control three
or more creatures, you gain 3 life.
Escape: {6}{b}{g}: Exile five other cards from
your graveyard. This ability costs {x} less to
cast where X is your devotion to black
and/or green