Flying

At the beginning of your upkeep, sacrifice Molting Harpy unless you pay {2}.

Flying

At the beginning of your end step, you may exile an enchantment card from your graveyard. If you do, create a 2/2 black Zombie creature token.

Flying

When Cavern Harpy enters the battlefield, return a blue or black creature you control to its owner’s hand.

Pay 1 life: Return Cavern Harpy to its owner’s hand.

Flying

When Blood-Toll Harpy enters the battlefield, each player loses 1 life.

Flying

{1}, Sacrifice another creature: Put a +1/+1 counter on Ravenous Harpy.

Flying

When Scavenging Harpy enters the battlefield, exile target card from an opponent’s graveyard.

Flying, lifelink

Flying

At the beginning of combat on your turn, each player mills three cards.

Flying

{1}{B}: Regenerate Screeching Harpy.

Flying

Ascend (If you control ten or more permanents, you get the city’s blessing for the rest of the game.)

Whenever another creature you control dies, if you have the city’s blessing, put a +1/+1 counter on Mausoleum Harpy.

Flying

Tribute 2 (As this creature enters the battlefield, an opponent of your choice may put two +1/+1 counters on it.)

When Shrike Harpy enters the battlefield, if tribute wasn’t paid, target opponent sacrifices a creature.