After threatening to kill Valvagoth by destroying the house, which the demon is bound to, Valvagoth instead strikes a deal with Marina where he promises to return the world to normal
Fate included 18 cards that manifest, and Dragons of Tarkir included one card that mentioned the ability but didnt actually manifest anything itself
On its own it is nothing, but there are a ton of ways for it to prove worthwhile and it got so bad that Wizards was forced to strike it down in some formats rather than ban other cards that served a more balanced purpose
Glimpse of Nature A card banned in multiple formats because its so easy to win after you cast it, Glimpse of Nature will draw you a card when you cast a creature
Imprisoned in the Moon and Darksteel Mutation are all generally the best ways to get rid of a pesky commander, because theyre generally harder to deal with than simply recasting your commander
Im really not sure its possible, but if it is thats a clear winner