Perdition

Perdition is colorless
{t} Add {b} to your mana pool
{3}{b}{t} Exile target creature, at the next upkeep flip a coin. If the coin landed on heads, return the creature under its owners control with three +1+1 counters on it. If the coin landed on tails, the creatures controller loses three life and discards a card.
Somewhere between the three world lies a place of constant anxiety and dread. Those who come here never come back the way they came in.