This is The High Keep quest, which unlocks Highwing as a flying mount on completion. You have to sneak into the castle, complete a variety of puzzles, and then rescue Highwing from Rookwood's poachers.
This is The High Keep quest, which unlocks Highwing as a flying mount on completion. You have to sneak into the castle, complete a variety of puzzles, and then rescue Highwing from Rookwood's poachers.