Cesspit of the Guildpact

{t}: Add {c} to your mana pool.
{b/g}, {t}: Put the top card of your library into your graveyard. Then, you may get target creature dirty. (Exile a card from your graveyard face-down onto target creature. Dirty creatures get -1/-0 for each clod of dirt on them.)
"There isn't enough Febreeze on the entire plane to deal with this place. Burn it. Burn it to the ground." -Jace, the Pooping Guildpact