Blinding Light

Commander is where Blinding Light earns its slot: three opponents mean three boards worth of creatures locked down, and the nonwhite clause is almost irrelevant in a format where white creature decks are rare on the other side of the table. It fits cleanest in white control and pillowfort builds that want to survive long enough to close games, and it doubles as a combat trick when you need to swing past blockers. Legacy and Vintage have it on the legality list, but neither format gives a three-mana tap-all sorcery the time of day — faster interaction makes Blinding Light a non-starter there. Oathbreaker could find a niche use for it in the same vein as Commander, though the smaller game size reduces the return.