"How is he? Will my son ever recover from the bugs that turned his brain to mush?"
The doctor pointed to where the thirty-seven year old was playing with toys on the floor. "It's been five years now and he has the brain of a child, give it another five and we can start the basics of teaching him magic again. He knows who you are but...but he will never have the same personality again, and by the time he regains all his magic skills at their former levels he will be in his sixties."
And in the name of the great and powerful I command thee to return to your body, hearth and soul, so that you might walk again and continue in the gods plans.
See that. . . wait. . . what!?! NO! I knew it was too risky here. You have brought ruin to us all. Why you ask? Ready your weapon, a traveler has come.
-Father Hayden, performing a ritual on the deceased outside the protection of the church.
Some parallel worlds have different time-flows, like the fabled dwelling-places of the elves: those who visit them under the hill for a night return to find that years have passed in this world. Perhaps it is the gate leading between the worlds which causes the alteration. If a gate were 'misaligned', the shift from '| |' to '| \' or '| /' as it were would lead to that difference, much as a light-beam split and bent by a prism ends up taking a longer path. There might even be a mathematical function linking degree of misalignment to alteration of time-rate.