Zargothrax, Dark Sorcerer

Whenever you cast an instant or sorcery, put a
Chaos counter on Zargothrax, Dark Sorcerer.
Remove X Chaos counters from this creature,
counter target spell with converted mana cost
X or less.
{8}{b}{b}:{t}, Target opponent looses the game if
they have two ore more legendary creatures in
their graveyard. Activate only as a sorcery.