Cheapest priced copy (Tenth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Dragon's Claw 
Artifact · Uncommon · Duels of the Planeswalkers · #92
Whenever a player casts a red spell, you may gain 1 life.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $0.35 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 322 | Uncommon | $0.35 | $3.49 |
| Ninth Edition | 296 | Uncommon | $0.35 | — |
| Ninth Edition | 296★ | Uncommon | — | $3.49 |
| Duel Decks: Knights vs. Dragons | 63 | Uncommon | $0.35 | — |
| Duels of the Planeswalkers | 92 | Uncommon | $0.35 | — |
| Darksteel | 117 | Uncommon | $0.35 | $0.49 |
| Magic 2010 | 210 | Uncommon | $0.35 | $0.49 |
| Magic 2011 | 205 | Uncommon | $0.35 | $0.79 |
| Magic 2012 | 206 | Uncommon | $0.35 | $0.49 |
| Salvat 2011 | 188 | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 1 October 2009The ability triggers whenever any player, not just you, casts a red spell.
- 1 October 2009If a player casts a red spell, Dragon’s Claw’s ability triggers and is put on the stack on top of that spell. Dragon’s Claw’s ability will resolve (causing you to gain 1 life) before the spell does.