Kydarial, Moon Killer

Shroud, haste, flash Whenever Kydarial deals combat damage to a player, it gets X +1-1 counters where X is Kydarial’s power. At the beginning of your upkeep if Kydarial’s power is 12 or more, remove all counters from Kydarial, Exile all other nonland permanents and gain X live where X is the converted mana cost of permanents exiled this way.