Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Last Breath 
Instant · Uncommon · Mercadian Masques · #27
Exile target creature with power 2 or less. Its controller gains 4 life.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
5 printings · $0.35 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 15 | Common | $0.35 | $0.49 |
| Mercadian Masques | 27 | Uncommon | $0.59 | $9.99 |
| The List | MMQ-27 | Uncommon | $0.35 | — |
| Shadowmoor | 11 | Common | $0.35 | $0.49 |
| Theros | 22 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 15 September 2013If the creature is an illegal target when Last Breath tries to resolve, it won't resolve and none of its effects will happen. Its controller won't gain 4 life.