Chaoswalker Undro

Flash
You may cast Instant and Sorcery spells from your graveyard. When you do, you lose life equal to the converted mana cost of the spell. After you cast a spell this way, exile it instead of putting it into your graveyard.
{x}{u}{b}{r}: Counter target spell. If the spell is countered this way, each player loses life equal to its converted mana cost.