Myojin of Infinite Rage

Commander is the only format where Myojin of Infinite Rage is worth serious consideration — a multiplayer table means three opponents lose all their lands simultaneously, which converts a symmetrical effect into a lopsided one if you rebuild faster than they do. Pairing it with land recursion, mana doublers already in play, or a commander that benefits from an empty board (Ruination effects, Wildfire strategies) is what separates a game-winning play from a mutual setback. In Legacy and Vintage it's legal but irrelevant — nine mana doesn't exist in those formats outside of fringe Sneak Attack shells, and even there the payoff isn't worth the slot. Modern is the same story: the card is theoretically castable and practically never played.