The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Just a thought you could have the guard Captain in on the whole deal as he has been bribed by the merchant, on checking I think that the ring is called "A ring of Mind Sheilding" .
Just a thought, Like it , love it or ignore it , have fun
Marcus