Well... finally, he needed it, his prosthetic arm was useful, but it clearly wasn't able to keep up with his own strength, and whatever is in the dungeon probably will make short work of it too, as Draken did.
But man... seriously? You chucklefucks from the guild let this escalate to this point and you act like it isn't your fault, not even your problem, even.
If Draken didn't have that permit, it looks like the guild would let everyone die inside there just to sweep everything under the rug.