Narzem of the Eternal Horde

Other skeletons you control have +1/+1 and haste.
At the beginning of combat on your turn, you
may create up to X 1/1 black skeleton creature
token, where X is the number of creatures in
your graveyard or exile, then lose that much life.
Sacrifice X skeletons : Put target creature with
mana cost X or less from your graveyard to the
battlefield under your control. It becomes a black skeleton.