Silooth

Consume {r}{r} (In addition to cost, sacrifice a Being
or Creature on your field. Place +1/+1 counters onto
this card equal to the sacrificed card's defense value.)
Acid Spray {t}{r}{r}{r} (Target a card on the
opponent's field and place -1/-1 counters on it equal to
this card's attack value.)
"The Tale of Kalsunor is a cautionary warning about alchemy and the Silooth creature."