The Rules of the Game
I’ve taken the liberty of adapting the rules from the original vintage challenge to this one. I’ve relaxed them in some places to allow for the limited cardpool, but for the most part I’ve left them as-is.
-Start with a Standard-legal deck of exactly 60 cards. No less, of course, and if we allowed more, you could deal arbitrary but finite damage by including as many copies of Rat Colony as you feel like, and it wouldn’t break the other rules.
-Conditions caused by randomness can resolve any way you like. In this deck, that mostly means that every single card draw is a Demonic Tutor in disguise: you can assume that the order of your deck is exactly what you want it to be. This veers pretty heavily into magical christmasland, but if we didn’t do it this way you’d have to figure out the average amount of damage a deck could deal, which is probably impossible.
-The opponent is a goldfish with a deck of 60 random basic lands. However, they are still playing to stop you: if you give your opponent a choice, they will pick whichever one is worse for you. The only exception is that they won’t concede the game. This is a sadistic goldfish that wants to make you play it out.
-No going infinite. Infinite really means “arbitrary” in magic, most of the time, so we define it like this: when you make your deck, I pick a finite number, say, a million, or Graham’s Number, or four. If, no matter what number I pick, there’s a line your deck can take that will deal at least that much damage, your deck goes infinite and is disqualified.
-This doesn’t matter to our deck, but other rules of magic apply: if I put 80,000,000 copies of Shock on the stack and target my opponent with each one, they’ll die on the tenth one, and I’ll have dealt only 20 damage. In practice, that means you’re either winning with a giant X-spell or by attacking with a lot of very big creatures.
-In the old challenge, you had to go off on turn one. Here, that rule is relaxed, with a caveat: the fewer turns required, the better. No one is impressed that you can deal a lot of damage on turn 50, or 50 million for that matter.
... We spend a fixed amount of life to recast Dalakos, and gain on the order of 3^X mana, enough for roughly 3^X more brooms. We can then use another Constellation trigger to turn almost all of the new Brooms into Nyxbloom Ancients, and repeat the process. After X repetitions we get about 3^^X Brooms. We can repeat this for all of the initial Constellation triggers, so we get about 3^^^X Brooms after all is said and done.