Arcane Comprehension

Counter target spell or ability. If a spell was
countered this way, at the beginning of your
next main phase, you may cast the countered
spell without paying its converted mana cost. If
an ability was countered this way, tap target
creature you don't control, it's doesn't untap
during its controllers next untap phase an it can't activate its activated abilities until the end of
your next turn.
"Silence, I've seen enough." Darrius, Archmage