Fiora, Prodigal Daughter

Flying, Ward - Sacrifice four Treasure tokens.

Whenever a creature dies, create a tapped Treasure token. Treasure tokens you control are Blood tokens
in addition to their other types.

{t}: Gain control of target creature with mana cost less than or equal to the number of Treasures you control. Your opponent then gains control of your Treasures equal to the creature's mana cost.