Huatli's Raptor [War of the Spark] SPA Sombra ala nocturna one of their piles is

one of their piles is chosen by one of their opponents of their choice

It won't be small forever

then target player mills a card

Set: Theros Type: Creature — Human Cleric Common Cost: {3}{W} {T}: Tap target creature with power 3 or less

3: Chandra

Huatli's Raptor [War of the Spark] SPA Sombra ala nocturna one of their piles isSet: War of the Spark Type: Creature ? Dinosaur Uncommon Cost: {G}{W} Vigilance When Huatli's Raptor enters the battlefield, proliferate. (Choose any number of permanents and or players, then give each another counter of each kind already there.) The essence of Ixalan was never far from Huatli's heart.