I know match winners are usually either banned or flat-out illegal to use in official duels, but Im thinking the hoops one would have to use to win a match with this card AND the built-in time limit would actually balance the card out for it to avert that fate, especially since all the Forbidden One pieces needed to get the card out have been limited since forever anyway
Use Curse of Darkness during the opponent's draw phase to lock down the Lava Golem
They play some of the most powerful bombs in the room and they're not easy to stop
Players then take turns to perform various actions such as placing an energy card on a Pokmon card, playing a trainer or item card or placing more Pokmon cards on their bench
Brawl Legal Vintage Restrict
(Its not actually infinite infinite because if you use Rals ultimate and fail all five flips you cant keep untap the Veil, but at least you get infinite Planeswalker loyalty.) It will be popular in some EDH decks and in casual circles, but I have real trouble imagining this being good enough in any other format