3.5 Campaign Idea help...

I have an idea for a campaign that has no magic only psionics. I have
posted the primer I made below. I would like your opinions on it and
any ideas you have from it/for it. TIA.

Some Dude

---Begin Primer---
"My father spoke of the White Age. The time before the
Domitors came. It was an age of wonders and magics where people
worshipped gods whom granted them powers to heal and create, where
wizards wove the very essences of reality itself into works of art and
splendors that we cannot even imagine today, where even the most
common of folk could call upon magic in their blood to do the simple
tasks that their life demanded. Magic was the lifeblood of that
society and the humans used it to make a utopian world where everyone
was in peace. That peace was shattered and was never to return.
No one remembers how it all started but we know that a gate to hell
was opened. Through this gate cam a multitude of demons led by a few
powerful demons that we now know as the Domitors. This invasion was
obviously planned in some manner as the Domitors and their demonic
minions were bedecked with equipment that made them immune to the
magics of this world. No work of magic from the peoples of this world
could harm them nor did it function in their immediate presence.
However, their magics worked to foul effect. They ran amok through our
cities and country sides leaving death and chaos in their wake. For
less than a month the people of this world fought to defend themselves
from this force of darkness to no avail.
In a last ditch effort to dispel the invaders the council of many
gathered in secret to perform a ritual shown to the priests of various
deities and in the divinations of the wizards. This ritual was
supposed to be a mass banishment of the invaders and a closure of the
gate. Unfortunately for us, one of the council, the infamous Ragoth,
was a traitor and informed the enemy of the time and place of this
ritual. The ritual, now known as the great sundering, was performed by
all the most powerful priests and wizards known to man. The magic
worked in that place was so tremendous that it could be felt in other
worlds outside of ours, so the stories say. At the ritual's crescendo
the demons attacked, led my Fe'lak the mighty, known to you as the
mother of the Diaboli. They disrupted the ritual and the resultant
energies, spiraling out of control, whipped across the face of our
world with an unforeseen effect, it destroyed magic. It turned our
world into what the demons refer to as a Dark world. Magic no longer
functioned in any form on our world. This caused the closing of the
gate that the demons came through and gave humanity the ability to
fight on better terms. However, the demons that had crossed over and
had been mostly unchecked in their battle did not and could not return
home. Thus began the Dark Age.
Magic was gone and with it the voices of the gods that guided us to
the utopia of the White Age. We were man and man alone. Only our
strength of arms and wit to rely on, we spread to the four corners of
the world. But the battle was not against us alone anymore. The demons
started fighting against each other. Many who came only did at the
behest of the Domitors, some controlled by magics were now free to
think on their own, some came seeking glorious trophies to bring home
and some came in fear of the awful magical might of the Domitors. All
these things were removed from the equation and an uprising began.
Battles swirled across the land. Demon and human alike were in the
throes of battle for generation upon generation. This hardening did
have some positive effects upon the human race. The race of man had
become soft with no real threats to their dominance, while many died;
those who survived became better than the previous generations and
trained those that followed in the arts of war and survival.
Also, unforeseen effects of the magical wave from the great sundering
caused some changes in the world. New races sprung up, seemingly from
nowhere. The first to join in the war against the Domitors was the
Animen. Seemingly a cross between man and animal, these new humanoids
built societies in the wilderness and started striking out against the
invaders. Eventually they became allies with the humans who managed to
survive and now live and fight side by side against their common
enemy. Although, like the race of man, they have had some of their
number side with the Domitors for various reasons, their loyalty to
each other seems almost bred into them and traitors are a very rare
occurrence, compared to man to whom traitorous actions are always a
concern.
Another unforeseen occurrence, Fe'lak, after having disrupted the
ritual and realizing the ramifications of the loss of magic wanted to
solidify her own position, captured hundreds of men and fled to a
place deep underground. There she began forcing those men to breed
with her creating thousands of offspring. These offspring, a strange
mix between man and demon became a race unto themselves now known as
the Diaboli. The majority of the Diaboli live in the underground city
known as Reigard and Fe'lak still rules it as queen. The Diaboli are
an island unto themselves, somewhat like mercenaries, signing on with
whoever can supply the whims of Fe'lak's needs at the time. There are,
as with any race, those who strike out on their own and the Diaboli
have no ill will towards those who do so. It is usually groups who
leave the confines of the Depths, as the underground kingdom is
called, that hire on with one side or the other on some permanent or
semi-permanent basis.
The last of the races are the Grim. The Grim are a race of
pale-skinned, four armed, tall and lithe humanoids. It is said when
the magic of the world died, the Earthmother, patron of the
nature-magic wielding druids, wept tears of the purest white and that
those tears took humanoid form. As a people they have taken it as
their task to remove the taint of the invaders off of the world. They
still worship the Earthmother even though she no longer speaks to her
followers nor grants powers. In her name they fight the demons and
their minions feeling that they "killed" their patron. They see the
Diaboli as lesser versions of this taint but see them as the lesser of
evils. There are occasional battles between the races but usually
skirmishes between small groups rather than the races as a whole but
the tensions run deep.
For a time both sides retreated onto themselves, the servants of the
Domitors to consolidate power and eliminate threats from within and
the humans to rebuild and grow stronger. Eventually the Domitors
purged many of the derisive elements and banished the rest to lands
far away. The humans with the aid of the new allies have rebuilt to
the point of offering serious resistance to the Domitors. The battle
between these two sides has raged on for millennia. The face our world
is a blasted war ground compared to the utopian wonderland it was, or
at least when we compare it to images surviving from that time.
However, in recent generations there has come a new hope.
Deep in the Jalklan Forest, a group of humans retreated as far from
the remains of civilization as possible. They built a fortification
and decided to look inward for salvation following the doctrine of the
battle monasteries of old. However, instead of looking for enlightment
through physical combat, they instead sought the powers of the mind.
For thousands of years this continued with tiny leaps of progress
coming from an individual every few hundred years, that is, until
Gotenalus came along. Gotenalus seemed a natural philosopher and
theorist. He took the ages old laws and rules of the mind and
formalized them into fields of mental study. In doing so he broke
barriers that had stymied the masters who had come before him, and all
this by the age of twelve. Eventually he was the first to develop the
Art, as we now know it. As a teacher he was not rivaled and
effortlessly taught the Art to those in the monastery willing to learn
it. News of this discovery spread like wildfire and soon the unified
races were sending their best and brightest to come and learn from
these venerable masters. It was not long before the Domitors learned
of this as well and sent war parties to destroy this place and those
within it. The second of these caused the death of Gotenalus who
became the first Saint of the Art. Eventually the Monastery of Saint
Gotenalus, as it is now called, became besieged so regularly that it
stopped receiving new students. This changed, however with Howl. Howl
was a Diaboli student of the Art who was formerly a warrior trained by
Fel'ak herself. He, having learned the rudiments of the Art, wanted to
travel back to the Deep to give his people a new weapon. He was
hampered by the forces of the Domitors who now started to wield the
rudiments of the Art themselves. He started mixing the formulas of the
warrior and the artist to become a Way-warrior. He stayed on and
taught the Battle Art as it is now known. Eventually he made it home
to teach the Diaboli and started a monastery there known as the School
of Saint Howl; as he was sainted by dying in the Battle of Bloodfield
holding back a charge of demons by himself.
Now is a glorious time. We are at the dawning of a new age. The
Artists are starting to expand their Art to do wondrous things.
However, it seems that contacting any intelligent creature from
outside our world or transporting anything or anyone in or out does
not seem to work. Relevant theories all seem to be correct but the
powers do not work. Why this is happening is widely speculated but no
solid evidence is available. The Artists can, however, pull in ether
from the outside allowing them to crease creatures and items to fight
with. The battle against the Domitors is still pitched but the
conglomeration of the races and the Arts has given us hope. It is with
this hope that I send you out into the world, ready to face the
enemies and once and for all free our world from its captors, to bring
about a new age. Good luck in your travels and may the Art guide you."
- Vanito the Ancient giving a Graduation speech for the Academy
of the Art

Shawn Roske wrote:
> Something about how magic works. demons are always fun. i liked how
> david eddins did demons in his belgariad series.
>

Not to get off topic, but what demons? I don't remember any demons in
the Belgariad. The closest I can recall were the Grolims that ended up
looking like dogs. Do I need to go back and read it again?

Oh... and it's Eddings. You lost a g in there