Throne of the Fallen King

Whenever a legendary creature enters the battlefield under your control, you may pay {2}. If you do, exile it and Throne of the Fallen
King.
As long as Throne of the Fallen king is exiled, creatures you control get +1/+1 for each creature own from exile. In addition, you can still activate the activated abilities of creatures you own from exile, and their triggered abilities still trigger.