Filtered to Rhodey
As a Master of the Mystic Arts, I might also be able to offer some insight. I have the text mentioning the Atlantean trident and I've handled it personally, since it's locked in this Sanctum. I can tell you it doesn't act in the same manner as a scepter with a Mind Stone does. Anyone controlling the trident must have an excessive force of willpower, or bottomless anger, in order for any elemental force to do their bidding. At all. That's why such relics are dangerous in the hands of the uninitiated.
I expect that if the prisoner has been magically influenced, then it must be from another outside source. Or they are naturally adept all on their own, albeit untrained.
Make no mistake, while my primary concern is Wanda's safety, I'm also interested in her findings. If some other unknown item is influencing people via magic, it needs to be locked away immediately. If it's another individual doing this, they need to be contained.
I appreciate your concern but that's not necessary. Many of us astral project to read or travel to different dimensions while our bodies rest.