C276 Mother and son recognize each other and then the ghosts will disperse their grievances
Inside the array, the ghost mother was urging Yang Sha's body to break through the Turtle Snake Formation, but she was pressured by the coalesced power of the Turtle Snake to the point that she couldn't move at all.
I don't think the monster can get out without a lightning pool.
However, setting up the lightning pool could also be considered a form of risk assessment