it's two of my decks that get treated like that now :/ they banned one of my decks out right when i killed all other 5 players in one turn the first time i played it...
It's a deck that has the potential to creature stupid amounts of stupidly large token creatures. I made 40 40/40 myrs, then 80 80/80 wolves, which in turn made those myrs into 120/120s. Cathars crusade is horrible in token decks.
board wipes, killing my token generation before it gets going, returning any creatures of cmc less than 2 to the hand.. there's loads of ways to destroy it.
the main issue is my tokens come from an artifact and an enchantment and our group has lame removal for them. I'm okay with it being banned, because even if i was to play it i would be rush killed within a few turns.
working on a new one right now that is mono black and makes people discard so many cards that they can't really do anything. plus an enchantment that means they have to pay 5 life for any spell they cast unless they discard along with it.
i have played against a similar deck... except it made me discard until i removed x amount of lands from deck... so i had to keep top decking and removing...