Anurid Scavenger 
Creature — Frog Beast
Protection from black At the beginning of your upkeep, sacrifice this creature unless you put a card from your graveyard on the bottom of your library.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL