mtg one of one cards Lightning, Army | Final Fantasy [Delay] Together as One | Secrets

Kinjalli's Sunwing helps slow your opponents down to your level by making their creatures enter the battlefield tapped

(White, Green, Red can easily destroy an artifact, Blue -- counters, bounces or steals, Black can either discard it first or use rare stuff like Gate to Phyrexia)

It sure isn't cEDH, but I think it should be stronger than your average precon

Things get a bit messier when you introduce a Blood Moon

Games in this bracket can end in just a few turns if nobody stops you from popping off, but since all other decks are at about the same level, you can expect that someone will always be the threat

it all has to be aimed at one target player