Arthur didn't know what Isidore had gone through great lengths to hide in "Tate's Wand Store," but he knew that if he wanted to successfully retrieve what the other party had hidden there, he absolutely must not let the other party's corpse be exposed.
Once Isidore's corpse appeared before the public, it would definitely attract the investigation of the Countess.
Isidore was not some nameless nobody who had died.
As one of the founders of the Mouse Council and the true leader among them, his death would certainly draw close attention.
Who killed him?
Why was he there?
With one question after another, the fact that something was hidden inside "Tate's Wand Store" simply could not be concealed.
Even if he tried his best to cover it up, it would probably only result in a "Thunder Strike" from the Countess.
Because the flaw was too significant.
However, if Isidore's corpse disappeared,
Then things would be much easier!
Fortunately, he still had a decent "Corpse Hiding Box."