Necromancer Shade

When Necromancer Shade enters or leaves the battlefield, create a token that is a copy of target creature card in a graveyard, except it is a black zombie with undying in addtion to other types.
Zombies you control have +1/+1 and first strike.
When another non-zombie creature dies, create X 1/1 black zombies with haste, where X is that creature's devotion to black.
{b}: Necromacer shade gets +1/+1 until end of turn.
{x},{t}: Create a X/X black zombie with undying. you lose X minus 4 life.