A Djinni-us Plan
During the heist of the Reeve's Manor, the party trapped a Djinni in the Bag of Colding. At some point they will need to deal with it if they want to access any of the items in there, and it probably isn't at all happy with them.
Ship's Log 5: After tricking the none-too-observant Djinni Amroq into taking Velma The Vulture captive instead of the party, they outsmarted him in a battle of wits and were granted their freedom along with a parting Wish. Amroq has returned to his native Plane of Elemental Air where he lives in an opulent mansion.