Shrike Harpy 
Creature — Harpy
Flying Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.) When this creature enters, if tribute wasn't paid, target opponent sacrifices a creature of their choice.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL