Urza's Rage

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.

Strixhaven Mystical Archive

The List

Modern Horizons

Commander 2015

Kicker {8}{R} (You may pay an additional {8}{R} as you cast this spell.)Urza's Rage can't be countered by spells or abilities.Urza's Rage deals 3 damage to target creature or player. If Urza's Rage was kicked, instead it deals 10 damage to that creature or player and the damage can't be prevented.

A spell or ability that counters spells can still target Urza's Rage. When that spell or ability resolves, Urza's Rage won't be countered, but any additional effects of that spell or ability will still happen.

If the target for Urza's Rage becomes an illegal target, the spell won't resolve and will be put into its owner's graveyard with no effect. This is true even if its damage can't be prevented and even though it can't be countered.