Alchemists Apothecary

{t}: Add {b} or {u} to your mana pool.
{t}: Scavenge 0. (To scavenge, roll a d6. You get that many Resource counters in addition to the adjacent number.)
Pay 3 Resource counters: Target creature gets -2/-2 or +2/+2.
Pay 6 Resource counters: Target opponent loses 5 life.
Pay 12 resource counters: Destroy up to 3 target permanents.