Preston, the Vanisher

Flash

Flying

When Appa enters, airbend any number of other target nonland permanents you control. (Exile them. While each one is exiled, its owner may cast it for rather than its mana cost.)

Whenever you cast a spell from exile, create a 1/1 white Ally creature token.

The "legend rule" doesn't apply to tokens you control.

Whenever another nontoken legendary permanent you control enters, you may pay . If you do, create a token that's a copy of it. That token gains haste. Sacrifice it at the beginning of the next end step.

When this creature enters, you may exile another target permanent you control, then return that card to the battlefield under its owner's control.

When this creature enters, you may return another target nonland permanent you control to its owner's hand. If you do, scry 2.

Chroma — When this creature enters, create a 0/1 white Goat creature token for each white mana symbol in the mana costs of permanents you control.

When this creature enters, exile up to one target nonland, nontoken permanent you don't control with mana value 4 or less.

When this creature leaves the battlefield, the exiled card's owner creates an X/X blue Illusion creature token, where X is the mana value of the exiled card.