But...why? Also he's just hanging it on his belt. And I'm surprised he didn't tuck it away before teleporting back to a place he knows that Xykon and Tsukiko could be watching.
Good thing the hobgoblin 'janitor' had more than one pocket then, or else Tsukiko would have found something else along with a key.
Is there a comic strip where this is concretely mention? I thought the oak table might've been the "ring of defense" Durkon was talking about due to
a) it's a ring
b) the amount of rule-fu Durkon used meant only people familiar with the laws could use it to maximum effect. Durkon? Read that green book front and back. Gontor? Maybe skipped it over. Voila, Durkon wins.