Meddler's Due

If an opponent looked at your hand, countered
a spell you controlled, searched your library,
or cast a spell you own this turn, you may pay {0} rather than pay Meddler's Due's mana cost.
Meddler's Due deals 4 damage to target player.
"We have a term to describe filth like you, but you needn't know it. Charred corpses have little use for information of that kind. Or any for that matter."