I fully intend to throw an overly daunting OOC when I'm happy with it, including a trimmed down "Things you absolutely must know" section. It'll stand as a reference for skimming over when needed. As a bonus I fully intend to PM certain explanations and knowledge to only those that have made character that 'should' know it. This is so they can more expertly betray each other, should they desire.
Here's a little tidbit though to tide you over. The way illusions work is simple/horrible. Just as there exists no true absolute boundary between say, a desk and the floor once one goes down to a small enough scale so too is there no true absolute boundary between one mind and another. The illusionist diffuses their consciousness into the immediate area, fraying it into wispy little bits that invade the subconscious of those around them. So the illusionist and their victims share the same, often dangerous delusion. Skilled practitioners need to 'remember' where things were, this is how they trick people into walking into traffic and keep from bumping into things themselves. To do this most make use of clever heuristics or only slightly alter this skewed perception. This can be dangerous as the longer an illusion is sustained the more of one's mind 'thins' as a result, eventually leading to complete bodily failure and death as your mind simply stops regulating all those little things your body does 'without thinking about it'. Illusions effect an area that starts small and steadily grows, effecting all beings inside of this zone. Animals hate this. Illusions also have momentum, and effecting too many minds too quickly causes you to 'slip', losing control of it (And of course, bodily failure and death as above.) Older minds have more weight, as such older illusionists are more powerful and older 'anythings' much harder to deceive.
Here's a little tidbit though to tide you over. The way illusions work is simple/horrible. Just as there exists no true absolute boundary between say, a desk and the floor once one goes down to a small enough scale so too is there no true absolute boundary between one mind and another. The illusionist diffuses their consciousness into the immediate area, fraying it into wispy little bits that invade the subconscious of those around them. So the illusionist and their victims share the same, often dangerous delusion. Skilled practitioners need to 'remember' where things were, this is how they trick people into walking into traffic and keep from bumping into things themselves. To do this most make use of clever heuristics or only slightly alter this skewed perception. This can be dangerous as the longer an illusion is sustained the more of one's mind 'thins' as a result, eventually leading to complete bodily failure and death as your mind simply stops regulating all those little things your body does 'without thinking about it'. Illusions effect an area that starts small and steadily grows, effecting all beings inside of this zone. Animals hate this. Illusions also have momentum, and effecting too many minds too quickly causes you to 'slip', losing control of it (And of course, bodily failure and death as above.) Older minds have more weight, as such older illusionists are more powerful and older 'anythings' much harder to deceive.