Vulturous Aven 
Creature — Bird Shaman
Flying Exploit (When this creature enters, you may sacrifice a creature.) When this creature exploits a creature, you draw two cards and you lose 2 life.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL