The Fourth Arkentool
Parson's Stupid Meal claimed there were four known Arkentools (ref. needed), but only three have been identified. What is the fourth? Are there more?
Is it possible the fourth Arkentool already been introduced but simply not identified?
Is there a fifth? If so, will it invoke its constitutional right to remain secret?
Possible 4th Arkentools
This would presumably allow wholesale reshaping of the terrain, as when the volcano was uncroaked.(ref. needed).
A great pun, but who would use it? A Gump, perhaps?
The 4th Arkentool could be Parson's armband. It was after he received it that he scored his greatest 'victory.'(ref. needed)
The armband did not do anything until Parson inserted his watch (ref. needed). This could providet a bilingual pun: The German word for "wristwatch" is "Armbanduhr."
Possible Owners of the 4th Arkentool
I'm going to stop saying (ref. needed), 'cause it's obvious.
He is the protagonist of the story, after all. We could imagine a scene where he gets a hold of the Arkenhammer, and it turns shiny we get to call it "Maxwell's Silver Arkenhammer."
Who says people are only allowed to attune to one arkentool? Maybe there's an 'Arkenfireball.' Or an 'Arkenroom', 'Arkencloset' or 'ArkenKohls' where a character can go to get cool new costumes.