With the caveat that weve not gone hands-on with them yet or discovered some comically overpowered combos (except for one), heres our ranking
A lot of control decks simply look like things that delay the game as long as possible to land a big Revelation
This three-mana Blue artifact gives every planeswalker you control two new abilities, they can pay 0 loyalty to proliferate - which can give them an extra counter - and they can pay 12 loyalty to allow you to take an extra turn
Sarkhan Vol is another planeswalker that makes creature tokens, but for the first time as its "ultimate," the -6 ability on the card
Yahenni, Undying Partisan : Legendary Creature (Aetherborn Vampire), casting cost of two generic and one black mana, 2/2
Importantly, Auras controlled by other players don't cause creatures you control to become modified