Once Eisen returned to the stall, he quickly and quietly explained the situation to everyone before trying to hide himself a little bit better, so that no players would be able to spot him and figure out that it was Eisen that gave out the quest in the end. That would work against spreading the rumor that the Eisen in Ornier was the real one after all.
But when everyone knew about everything, Eisen just figured he should keep going with creating the shotgun-shaped staff, and for now just swiftly carved the stock out of magic wood, which was the perfect part to place a few general internal mana-batteries other than the ones that could be placed into the actual item by hand, so that all the enchantments placed on the staff could actually keep running for as long as necessary.