Greater Demon Summon

The most powerful of the summoning rituals of the Void, this spell calls forth a greater demon from beyond the Veil to the caster's current location. In order for this spell to be successful, the correct symbol must already have been inscribed in the room, in the correct material. If the combination is correct, a demon will be called forth, and will demand payment of the scholar in exchange for its services. Should the scholar be able to pay, the demon will then aid him, for a time.

Greater demons are often tremendously powerful; it is rumoured that the truly skilled summoner might even be able to call upon some of the greatest demon lords of the Void by this method.