Endrek Sahr, Master Breeder

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, Master Breeder.
"As her twisted experiments yielded increasingly gro-
tesque results, Endrek Sahr reveled in the power she
held over life and death. But in the end, her creations turned on her, leaving her at the mercy of her own
dark legacy."