Breeding Pit 
Enchantment
At the beginning of your upkeep, sacrifice this enchantment unless you pay .
At the beginning of your end step, create a 0/1 black Thrull creature token.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL