Cheapest priced copy (Jumpstart 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Fiery Conclusion 
Instant · Uncommon · Magic Origins · #144
As an additional cost to cast this spell, sacrifice a creature.
Fiery Conclusion deals 5 damage to target creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
5 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 530 | Uncommon | $0.35 | — |
| Magic Origins | 144 | Uncommon | $0.35 | $0.49 |
| Planechase 2012 | 42 | Common | $0.35 | — |
| Planechase Anthology | 42 | Common | $0.35 | — |
| Ravnica: City of Guilds | 122 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 15 April 2013Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.
- 15 April 2013You must sacrifice exactly one creature to cast this spell; you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures.