Endrek Sahr, Master Breeder

Endrek Sahr, Master Breeder {4}{B}

Legendary Creature - Human Wizard | Power/Toughness: 2 / 2
Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's converted mana cost.
When you control seven or more Thrulls, sacrifice Endrek Sahr, Master Breeder.