Cheapest priced copy (The Lord of the Rings: Tales of Middle-earth): $0.35 at Card Kingdom, near mint, their price list as of .
You Cannot Pass! 
Instant · Uncommon · The Lord of the Rings: Tales of Middle-earth · #38
Destroy target creature that blocked or was blocked by a legendary creature this turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lord of the Rings: Tales of Middle-earth | 38 | Uncommon | $0.35 | $0.49 |
| The Lord of the Rings: Tales of Middle-earth | 489 | Uncommon | $0.59 | $0.49 |
2 rulings from Wizards of the Coast
- 16 June 2023You Cannot Pass! only cares that the second creature was a legendary creature at the moment it blocked or became blocked by the target creature. If that legendary creature has become a nonlegendary creature (perhaps because it's no longer your Ring-bearer) or left the battlefield, You Cannot Pass! can still target the first creature.
- 16 June 2023You Cannot Pass! can target a creature that's currently blocking or being blocked by a legendary creature, or one that blocked or was blocked by a legendary creature earlier in the turn.