With 20 hit points each, the goal is win by drawing powerful spells and creature spells that can lower your opponents life total while sustaining your own hitpoints
sometimes, it can take a few months
Corrupted At the beginning of your end step, if an opponent has three or more poison counters, draw a card, then you may put a land card from your hand onto the battlefield
As for the two big decks, I guess you could ban Emrakul, the Promised End from GB Delirium, but I'm not even sure how much that would matter
But in decks that care about exile, like various Doctors Who, Prosper, Tome-Bound, Pia Nalaar, Consul of Revival, and especially Edgin, Larcenous Lutenist, this can easily get up to 5+ damage