Demonic magic is some of the most ancient and powerful magic. It is spawned from the raw violence of the conflicting energies within a demon, such power and strength compressed within an insant can generate untold forms of force and energy. One result of these primordial arts has to with rifts in space and time. If a Demon were to take the life of another being, provided that life was at least not trivial it would create a dissonance in the place of the energy expired and sometimes would allow for a portal to be formed which could be then passed through. This magic was popular in the days of Ankrahmun when their priests would use it on needed occassion. They would cut into the corpse of a recently expired spirit drawing it's blood out and then set it burning via magic to mimic a demon's fire, this would transmute the energy latent within the recently expired life to the air generating a portal to another place.
We lost three members in our last attempt at performing a controlled demon summoning. It is still too difficult to predict in what way the fabric of time and space is affected by the breach of the sphere, and from what we have seen the backlash of nature against demonic incursion can range from a slightly offensive odor to a sizeable explosion such as the one we saw yesterday. I am personally disappointed to observe that the elemental protection spells we put up did not work at all. Perhaps there is some truth in the reports that the unleashed energy is of purely entropic nature. We have yet to decide whether or not it makes sense to create an entropic counterspell first, but I support the idea that the loss of manpower while trying to balance the spell is manageable. It is possible, though, that this will lead to no convincing result at all due to the uncontrollable nature of the demonic realm. If this should be the case the use of entropic countermagic is the only option left.
By the way: The summoning of lesser creatures, the so-called 'reds', progressed comparatively well. Of course, these creatures are mere border dwellers and may consequently not be considered true demons. However, it may prove that the development of summoning spells for 'reds' will prove a rewarding spin-off of demon summoning research.