Forth Eorlingas!, while only legal in Commander and Eternal formats like Legacy and Vintage, is third on this list thanks to its power and flexibility
But it also helps to force through creatures like Azure Beastbinder with strong attack triggers, and multiple land drops (perhaps form a fetch land, or a Scapeshift) turn this into a late-game threat that wins easily
Breach the Multiverse will mill each player for 10 to load up the graveyards, then retrieve creatures and planeswalkers from each graveyard and put them right onto the battlefield
To show how efficient this card is for the right deck, the final versions of Miracle Grow, which were dubbed Super Grow, used Mystic Enforcer as a finisher, since by the time you'd get around to casting it you had an all but guaranteed 6/6 flyer for four mana
The sneaky thing about this card is that after its effect of giving escape to all of your nonland cards, it also can be recurred