Skysong, Normal Human

Other birds you control gain +2/+2
Whenever Koyanagi deals combat damage to a player, look at the top X cards of their library, and exile one, where X is the number of birds you control. You play that card from exile, and spend mana as though it were of any color to cast that card.

Whenever you surveil, transform Koyanagi.
"...it was like the cawing of a bird, but the only thing in the room was just a group of servants!"