Endrek Sahr, Master Breeder is a rare Legendary Creature — Human Wizard card from Commander Masters (CMM), collector number 155. Current market price: $2.61 (foil $3.90), TCGplayer market prices via Scryfall.
Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value. When you control seven or more Thrulls, sacrifice Endrek Sahr.