Cheapest priced copy (Amonkhet): $0.35 at Card Kingdom, near mint, their price list as of .
Trial of Solidarity 
Enchantment · Uncommon · Amonkhet · #34
When this enchantment enters, creatures you control get +2/+1 and gain vigilance until end of turn.
When a Cartouche you control enters, return this enchantment to its owner's hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 34 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 18 April 2017If an effect allows you to exert a creature as it attacks, you may do so even if it has vigilance. It won’t be tapped.
- 18 April 2017Trial of Solidarity’s triggered ability affects only creatures you control at the time it resolves. It won’t affect creatures that come under your control later in the turn.
- 18 April 2017Each Trial has an ability to return to your hand when a Cartouche enters the battlefield under your control. The Trial is returned to its owner’s hand only if it’s on the battlefield as the ability resolves.