Was recently considering usages for the Magic Jar spell, particularly what occurs when two instances of the spell cast by different people interact, and ran into a bit of a conundrum. There are two cases in particular I'm considering, but both seem tied to the same issue:
Two players cast Magic Jar separately, then while in the jar state, attempt to possess each others' catatonic bodies.
Player 1 possesses Player 2 with Magic Jar, then Player 3 also possesses Player 2 with Magic Jar.
Since the spell's target is self, it should get around the spell effect stacking rule in both cases, so should be castable. What is in question is the implications of the following line:
On a failure, your soul moves into the target's body, and the target's soul becomes trapped in the container.
While the desire by RAI seems to be that the soul present in the body at that point should be pulled into the jar, RAW makes it pretty clear that the original body and soul are linked regardless of who possesses the body at that point. But if I go by that ruling, then I run into some weird implications such as in the second example above. If Player 2's soul is the only one that moves from one jar to the other, then Player 2's body is now housing the souls of both Player 1 and Player 3 simultaneously.
Has anyone encountered this before? What is the best way by RAW to handle such a situation regarding Magic Jar and souls, and has there been any designer clarifications on the matter?