Mausoleum Harpy is a uncommon Creature — Harpy card from Rivals of Ixalan (RIX), collector number 78. Current market price: $0.04 (foil $0.50), TCGplayer market prices via Scryfall.
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 this creature.