Witness the End

Discard spells split on a single hinge: who picks the cards that go away. This one leaves that decision with the opponent, who exiles two cards of their own choosing and loses two life. That places it squarely in the lineage Mind Rot opened, where the caster strips quantity but the defender keeps control over quality, jettisoning the dead cards and clutching the answer you most wanted gone. At four mana for two cards plus a marginal two-life nudge, the rate sits beneath the hand-attrition black actually leaned on; Hymn to Tourach gets there at half the cost (and randomly, which is often crueler than a choice). The exile clause is the one real wrinkle: cards leave the game rather than stocking a graveyard, a quiet upside that only registers against decks built to mine their own bin for flashback, escape, or recursion loops. The devoid keyword is a structural artifact, not a lever the spell uses: stripping color was a set-wide identity device imposed from above, so this reads and plays as a black hand-disruption effect that happens to register as colorless to anything checking a card's color. As an attrition piece it is honest but slow, asking four mana to do work cheaper black does faster, and handing the steering wheel to the player on the receiving end.