Cheapest priced copy (Modern Horizons): $0.35 at Card Kingdom, near mint, their price list as of .
Urza's Rage 
Instant · Uncommon · Modern Horizons · #151
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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $0.35 to $69.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 169 | Rare | $0.49 | — |
| Duel Decks: Phyrexia vs. the Coalition | 36 | Mythic | — | $0.99 |
| Invasion | 178 | Rare | $3.49 | $69.99 |
| Modern Horizons | 151 | Uncommon | $0.35 | $0.49 |
| The List | C15-169 | Rare | $0.49 | — |
| Strixhaven Mystical Archive | 47 | Rare | $0.49 | $1.49 |
| Strixhaven Mystical Archive | 110 | Rare | $2.49 | $3.49 |
| World Championship Decks 2001 | ar178 | Rare | $1.29 | — |
| World Championship Decks 2001 | jt178 | Rare | $2.29 | — |
| World Championship Decks 2001 | tvdl178 | Rare | $1.29 | — |
8 rulings from Wizards of the Coast
- 14 June 2019A 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.
- 14 June 2019If 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.
- 8 November 2024The kicker ability doesn't let you pay a kicker cost more than once.
- 8 November 2024If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
- 8 November 2024To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions. The spell's mana value remains unchanged, no matter what the total cost to cast it was.
- 8 November 2024If a spell's kicker cost was paid, the spell is "kicked."
- 8 November 2024If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
- 8 November 2024If you copy a kicked spell on the stack, the copy is also kicked. If the copied spell is a permanent spell, the token the copy of that spell becomes when it enters is also kicked.