A Plague of Mephits

Quest giver: Delver Hagorn
Requirements: Get to the Delve
Phrase: favor
Reward: Chronobines, Miniature Rallosian Left Vambrace Shell

Straightforward kill task, any 8 mephits will do. Loot two hearts, about 1 in 5 drop rate so can take a while to get enough for a group, and give them to Hagorn to complete the task.