If I land on Abandoned Hall with Thrill of the Hunt, can I give the unit +1?

Yes, if you use Thrill of the Hunt to move a unit to Abandoned Hall, you can give that unit +1 [M] (Might).

According to RiftJudge FAQ #10728, which clarifies the authoritative timing for Abandoned Hall, the ability triggers only after the spell that caused it has successfully completed its resolution process.

Sequence of Events

1. Play Spell: You play Thrill of the Hunt as a [Reaction] to an existing game state (or as an [Action]). It is placed on the chain.
2. Resolution: Thrill of the Hunt resolves. Its effect executes: your unit is banished and then played to Abandoned Hall.
3. Trigger Condition Met: Because the spell (Thrill of the Hunt) has now successfully completed its resolution process, the "When a player plays a spell" condition on Abandoned Hall is fulfilled.
4. Trigger Placed: The Abandoned Hall triggered ability is placed on the chain.
5. Resolution: You resolve the Abandoned Hall trigger. Because your unit was moved to the Abandoned Hall during the resolution of Thrill of the Hunt (which occurred before this trigger was placed on the chain), it is currently at Abandoned Hall and is a legal target to receive the +1 [M].

Key Clarifications:

• Trigger Timing: Triggered abilities that occur when a card is played (such as the one on Abandoned Hall) are placed on the chain only after the spell's resolution process is fully complete.
• Targeting: Because the unit arrives at the battlefield before the Abandoned Hall trigger is placed on the chain, it is present on the board when the trigger resolves and is therefore a valid target for the buff.
• Authority: As noted in RiftJudge FAQ #10728, this interaction is the current authoritative interpretation and supersedes older, conflicting FAQs regarding the timing of this trigger.