Cheapest priced copy (Ikoria: Lair of Behemoths): $0.35 at Card Kingdom, near mint, their price list as of .
Go for Blood 
Sorcery · Common · The List · #J22-540
Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)
Cycling {1} ({1}, Discard this card: Draw a card.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 122 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 540 | Common | $0.35 | — |
| The List | J22-540 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 17 April 2020If either target is an illegal target as Go for Blood resolves, no creature will deal or be dealt damage.