[johndallman]

Originally Posted by Fred Brackin

I think one way travel from mana to no mana is generally possible. You certainly can't cast a Plane Shift spell in a no man world though.

I took that option, simply to create a serious danger for my PCs to consider.

In the default IW setting there would definitely seem to be some provisions made by the Cabal for travelling through no mana worlds. One of the Cabalist template lenses is for world-walking abilities using natural portals and needing no mana.

I strongly suggested to the players that they should not create characters who just die in zero-mana environments, and that it would be good to have someone who used world-walking. The four PCs are two mages, one with a magical artifact that does Jumper, creating portals, and a psionic who's a world-walker. He feels less powerful than the mages, but his status as an emergency backup is appreciated.