What happens to a creature or object that exists across the boundary of the bubble, being partially inside and partially outside?
What happens if an emanation is fixed upon a point in space, and then the Dream On bubble (being an emanation and thus mobile) moves so as to encompass it or so that the emanation's anchor point is no longer inside?
A creature has to make a Will save to leave, but what happens if it's the bubble that leaves them? That is, what if the bubble is the one moving and the creature is staying still?