Urza's Rage is a uncommon Instant card from Modern Horizons (MH1), collector number 151. Current market price: $0.18 (foil $0.35), TCGplayer market prices via Scryfall.
Kicker {8}{R} (You may pay an additional {8}{R} as you cast this spell.) This spell can't be countered. Urza's Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can't be prevented.