Not only is it strong but it might just be more fun
Creatures that return themselves to the battlefield for free are inherently powerful, so I dont want to write this off, but not seeing a good home has me suspicious
Still, we've seen decks make good use of The Mightstone and Weakstone, and Invasion of Ravnica is even more flexible, exiling things like Wedding Announcement, Fable of the Mirror-Breaker, and The Eternal Wanderer along with exiling most creatures
Thorn of Amythest + Sphere of Resistance Thorn of Amethyst and Sphere of Resistance fulfill similar roles as heavy taxation effects
He also aided in designing the five-colour mana symbols that still grace cards printed in contemporary sets
Rooms are a mechanic in a subset I call "two-in-one cards." These are cards that represent two cards but exist on a single card, although possibly on both faces