So just posting this so I can say I called it. Ardon's brother isn't alone. Manwell or whatever the name of the blue thing is hasn't be accounted for. From the number of poisoned things that were set up it seems likely he is rogue with poison use (if that is still a thing in 4e) or an assassin.
Also remember that radio transmitter Torrin had built. Could be to call in reinforcements.