Dark Necromancer

Haste, Lifelink, Trample
{x} equalls 8 if you already control a zombie or
vampire creature. Otherwise, {x} equalls 12.
When Dark Necromancer enters the battlefield,
it deals 1 damage to each creature, player, and planeswalker in play, and you put all of the cards
in your hand into your graveyard. While Dark Necromancer is in the battlefield, you cannot
play other legendary creatures or planeswalkers.
If Dark Necromancer goes into your graveyard,
exile it instead.