Gravebound (As this spell resolves, put it into your graveyard instead. If it would enter the battlefield or be put into a graveyard from anywhere, if didn't resolve, exile it instead.)
As long as Marrow Song is in your graveyard, whenever a creature you control dies, create a black 1/1 Skeleton creature token.
At the beginning of your endstep, if there are seven or more creatures in your graveyard, create Marrow Song Dancer, a legendary 10/10 black Skeleton god creature token with "Other Skeletons and Zombies you control get +2/+2." Exile Marrow Song.
