When Trial of Solidarity enters, creatures you control get +2/+1 and gain vigilance until end of turn.
When a Cartouche you control enters, return Trial of Solidarity to its owner’s hand.
If 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.
18-04-2017
wotc
Trial 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.
18-04-2017
wotc
Each 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.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.