Endrek Sahr, Master Breeder is a rare Legendary Creature — Human Wizard card from Secret Lair Drop (SLD), collector number 2620. Current market price: $1.60 (foil $2.20), 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.