Ossein, Dominating Dracolich

First Strike, Flying, Provoke
If a creature dealt damage to by Ossein would die,
instead exile that creature and create a token copy
except that copy is a 3/1 Black Skeleton
in addition to it's other types.
Pay {b}: Ossein gets +1/+0 until end of turn.
Sacrifice a Skeleton: Regenerate Ossein.