You must complete these quests, in this order, to get to Oakheart in the Jade Palace. A lot of these quests are the same side quests that you need to complete for the “Wizard Tours” quest or Obsidian Chests quest to get access to the one chest in MooShu.
Cave of Solitude 1. I’m Cursed (from Mossback) 2. Rock On (from Mossback)
Kishibe Village 1. Wear Your Gloves (from Mossback)
I was stuck with that too but I figured out how to do it. (from other places in the message boards) 1. Mossback quest in Cave of Solitude. 2. Mossback quest in Kishibe Village. 3. Mossback quest in Shirataki Temple. 4. Mossback quest in Ancient Buriel Grounds.
Hope this helps!!!
Scarlet Shadow, Level 48 Diviner Just defeated Malistare