Crater's Claws 

Sorcery
Artist:
Noah BradleyShare:
Text:
Crater's Claws deals X damage to any target.Ferocious — Crater's Claws deals X plus 2 damage to that permanent or player instead if you control a creature with power 4 or greater.
Rulings:
- 9/20/2014 If you control a creature with power 4 or greater, Crater’s Claws with X equals 0 will deal 2 damage, with X equals 1 will deal 3 damage, and so on.
- 9/20/2014 Some ferocious abilities that appear on instants and sorceries use the word “instead.” These spells have an upgraded effect if you control a creature with power 4 or greater as they resolve. For these, you only get the upgraded effect, not both effects.
- 9/20/2014 Ferocious abilities of instants and sorceries that don’t use the word “instead” will provide an additional effect if you control a creature with power 4 or greater as they resolve.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Legal
- commander: Legal
- duel: Legal
- oldschool: Not legal
Sets:
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Khans of Tarkir #106 (rare)
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Khans of Tarkir Promos #106s (rare)
Other languages:
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Crater's Claws