Quest 679

Walkthrough

 * After receiving the quest, head to the Dungeon (地下牢) inside of Farazard Castle (ファラザード城) and speak to Pahkas (パハカース) at the bottom floor in the jail cell at F6.
 * Go to Bloody Beach (血潮の浜辺) and defeat Raven Lunatic (デスフラッター) around B4 until they drop Pahkas' Bone (パハカースの肋骨).
 * Go back and speak to Pahkas again. He'll give you Pahkas' Memo (パハカースのメモ). Bring this back to Halley.
 * In Sand City Farazard, clean up the broken cart and graffiti at F6, the trash next to the Monster Tavern (モンスター酒場) at C5, and the graffiti in the Housing Area (集合住宅) at B6. (These tasks can be done in any order).
 * Go back and speak to Halley to complete the quest.