Nevras, the Necromancer

Eminence - If Nevras is in the command zone or
on the battlefield, skeletons you control have
+1 +1 and wither.
When Nevras enters the battlefield, create X 1/1
skeleton creature tokens where X is the number of
creatures in target graveyard, exile that graveyard.
Whenever a creature an opponent controls
attacks or blocks, if it had a -1 -1 counter on it,
its controller loses 2 life.
{3}{b/g}{b/g}{b/g}: Return Nevras from your
graveyard to the battlefield tapped.