The group needs to have metaphysics of 9+ to manipulate the stones. I had to bring in every character with high metaphysics to give my Watcher enough of a boost to do it. One of the consumables can also give +2. I don't know about trapping it as I didn't pursue that. Good luck!
The Shadow Under Neketaka Quest Issue
in Pillars of Eternity II: Deadfire Stories (Spoiler Warning!)
Posted
The group needs to have metaphysics of 9+ to manipulate the stones. I had to bring in every character with high metaphysics to give my Watcher enough of a boost to do it. One of the consumables can also give +2. I don't know about trapping it as I didn't pursue that. Good luck!