The Happy Stick's treasure hunting plan had been a long time in the making.
Ever since he dug out the first underworld vault beneath Crimson Castle and received intelligence about the Blood Vulture Arsenal, he had been trying to activate this hidden mission from Sir Morphy.
However, the mission had a prerequisite: his reputation within the Blood Vulture Clan had to reach the "Family Knight" title. That reputation level only became available after the recent Wolf Poison invasion, so it wasn't surprising that Stick Brother was slow to act; the game progression was stuck at that point, leaving him eager but helpless.