Yuumi, Magical Cat

Bestow {x}{w}{u} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature.
It becomes a creature again if it's not attached to a
creature.)
Flying
Enchanted creature has lifelink and +X/+X
where X is the amount of mana spent to cast
Yuumi.
Partner with Illaoi, Kraken Priestess