Abandoned Hall

Q: Player A has a unit (A) on Abandoned Hall. They play Ride the Wind, targeting unit A and declaring another battlefield as the move destination. When Ride the Wind resolves, may I choose to target unit A with Abandoned Hall’s triggered effect and give it +1?

A: No. Abandoned Hall’s trigger condition is met when a spell resolves. Ride the Wind resolves moving unit A from Abandoned Hall, then leaves the chain, while Abandoned Hall’s trigger is added on the chain as a pending item. When the battlefield’s trigger is being finalized, unit A does not constitute a legal target; if there aren’t legal targets at the battlefield at all, the ability is removed from the chain and it is not finalized. The same process happens when Ride The Wind moves a unit to Abandoned Hall, but in this scenario the trigger finds that unit as a legal target during finalization.

Abandoned Hall + Ride the Wind breviary (“may I give +1 to the unit I just moved?”):

• Ride TO Abandoned → YES
• Ride FROM Abandoned → NO

Relevant Rules:

• From the Unleashed FAQ, about the meaning of “Play”: The first meaning is, “resolve an item on the chain.” This is the play that appears in trigger conditions, in cards like Darius, Trifarian and Ravenbloom Student.
• 402.3. If there are not enough options to make legal choices for a Triggered Ability that has been put on the chain, remove it from the Chain now. It ceases to be a Pending Item but never becomes a Chain Item.