Butt Bank

If you would discard a card, you may instead
place it beneath you on your chair.
At any time, you may fart audibly. If you do,
choose one:
•Exile all cards from under your butt. Add one
mana of any color to your mana pool for each
card exiled in this way.
•Exile all cards from under your butt. You may
cast one of those cards this turn from exile
without paying it's mana cost.