Demon

Demons are extra-dimensional beings who originate from across the Veil. The Academy classification of "demon" is an umbrella term that includes any creature originating beyond the Veil that enters the physical world, which is somewhat vague and unhelpful when trying to classify the thousands of creatures that could be described as such. Their appearances, motives, and personalities vary drastically- though more often than not, those that cross the Veil willingly take the form of nightmarish monsters and hunt mortals for sport. It is widely believed that a demon's true form has yet to be seen by human eyes, and that the image they take in the physical world is formed purely by mortal emotion and memory.

Demons can be classified into three categories: Greater, Common, and Lesser. While Greater demons are extremely rare and have nigh godlike abilities, this isn't to say their Common and Lesser cousins are anything to be trifled with (Lesser demons do tend to be more agreeable than their counterparts, however).

Summoning, Binding, and Pacts
If a mortal gets their hands a demon's name and a summoning circle, a specific demon can be pulled through the Veil and into the physical world. If a demon is brought through the Veil (and the circle holds, keeping the demon from tearing the summoner asunder) they can attempt to Bind it or create a Pact. Anyone can make a Pact with a demon, even if they have no magical ability beforehand (something Witch covens are infamous for, as most Witches can only use magic due to demonic Pacts). A pact is usually easy to achieve for the layman, as demon's famously love making deals, but a sufficiently talented sorcerer has the potential to forcibly Bind the demon to their will without a Pact. Greater Demons are an exception to this, as no sorcerer in history has held the power necessary to force a Greater Demon through the Veil against its will, much less Bind it. When a Greater Demon is summoned it's usually by the summoner's mistake, or the demon's boredom- neither of which usually ends well for the mortal on the outside of the circle.