Cheapest priced copy (Future Sight): $0.35 at Card Kingdom, near mint, their price list as of .
Judge Unworthy 
Instant · Common · Future Sight · #9
Choose target attacking or blocking creature. Scry 3, then reveal the top card of your library. Judge Unworthy deals damage equal to that card's mana value to that creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Future Sight | 9 | Common | $0.35 | $0.49 |
| Time Spiral Remastered | 21 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 19 March 2021If the target creature is an illegal target by the time Judge Unworthy tries to resolve, the spell doesn't resolve. You don't scry 3 or reveal any card.
- 19 March 2021Destroying a blocking creature won't cause any of the creatures it was blocking to become unblocked. They won't deal combat damage to the defending player or planeswalker (unless they have trample).