Cheapest priced copy (Innistrad: Double Feature): $0.35 at Card Kingdom, near mint, their price list as of .
Purifying Dragon 
Creature — Dragon · 4/3 · Uncommon · The List · #MID-155
Flying
Whenever this creature attacks, it deals 1 damage to target creature defending player controls. If that creature is a Zombie, this creature deals 2 damage to it instead.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 155 | Uncommon | $0.35 | $0.49 |
| Innistrad: Midnight Hunt | 155 | Uncommon | $0.35 | $0.49 |
| The List | MID-155 | Uncommon | $0.35 | — |