Kagan, Cleanser of Graves

Flying
When Kagan, Cleanser of Graves enters the battlefield, exile up to 3 creatures from each graveyard. You may spend mana as though it were any color to cast creatures exiled by Kagan, Cleanser of Graves.
Whenever Kagan, Cleanser of Graves would be destroyed, you may instead remove a creature card from exile that was exiled by Kagan, cleanser of graves and put it back into it's owners graveyard.