Re: SJ=>ST, Re: Motive Force

Great minds think alike.  In my campain we have built a prototype ship that
works by using portals to the positive and negative material planes!
 However, we used them diffrently.  You may recal that the demiplane of
shadow was created by two such portals, for shadow is what you get when the
negative and positive energys collide, not energy.  This is acually better,
as far as propultion goes.  The 'shadow walk' spell allows its user to cover
grould about 10x fater by going to the edge of the plane of shadow.   By
using the "shadow drive", as we call it, we basically do the same thing with
our ship by creating a carefully shaped field of shadow and slipping to the
edge of the demiplane.
It has its problems.  First, it won't work in the phlogiston because you
can't acces other planes from there.  Secondly, the balance between positve
and negative must be perfect or weird things happen (on the maden voyage of
our prototype, the 'ShadowDragon', we were trapped in the demiplane of shadow
and the crew caught some strange disease from overexposure to negative
energy).