Sith Assassin of Pestilence

Rank III - Knight
Stealth, Ambush
Force Affliction {b}{b}{b} (Place two -1/-1 counters
on a Being or Creature card, then tap it for two turns.)
While this card is on your field, you can pay {p/b}{p/b} to move any -1/-1 counters on either field to
other appropriate targets on either field. Tap this
card after this effect is used.