Overblaze - Betrayers of Kamigawa - 114

Instant — Arcane

Mana Cost: {3}{R}

Each time target permanent would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead.
Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Uncommon · Betrayers of Kamigawa · #114 (BOK)

Illustrated by Ron Spencer