Blight

All magic, regardless of colour, has a certain set of rules that need to be followed in order to practice it safely. Similar to how different chemicals have different reactions depending on how they're mixed or heated. These laws of magic are one of the many certainties of the world that cannot be changed no matter how powerful or skilled a mage is. When these rules are broken ones magic will react poorly, leaving behind horrid scars known simply as "blight"

Like most diseases or inflictions blight generally starts out as mild. That's not so say there aren't cases where someone can be majorly blighted or even killed in one veil swoop, but more often than not blight is the culmination of magical misuse over a long period of time.

Blight starts out as a rash. Irritated skin which seems to flake or peel like a blister. As it progresses it has different effects based on colour. Most blight will look more or less the same towards it's end stages, but the effects it has on the body differ due to the effects of different colours of magic.

Purple Blight is by far the worst, and for food reason. Purple magic is the most dangerous and most powerful variant. It looks like thick, black, rotting skin with exposed bone. The red of purple magic is what causes the rot, but the blue of purple magic preserves the bone and any functionality the affected area may have had. Purple blight is not fatal due to side complications such as infection, but over time if one is blighted enough they will succumb to it; turning into a wraith.

Red blight eats away at the body causing it to rot and decay. Like purple it's a patch of thick, black, rotting skin with exposed bone. But because there's no preservatives whatever part of the body is affected acts as if it's really decaying. functionality will cease, bone will decay, and infection can happen easily if the wound is left open too long. Red blight and red magic infection often come hand in hand, and those who die as a result often turn into Fiends.

Blue blight is a bit different. While at later stages it does show up as a rotting black patch, in the early stages it shows itself as complete and total lack of circulation. affected areas of the body will become pale and cold, and injuries will heal much more slowly. Eventually the lack of circulation will cause these areas to die by circumstance, but blue blight (much like purple) will keep you alive even after succumbing to it. People who "die" due to blue blight will remain wandering Mirror Domain as living skeletons unable to shed their souls and return to the afterlife. All functionality of affected areas will remain, as blue magic acts as a preserving agent of sorts. Technically speaking they're still mortal, as their soul never undergoes any shift in colour or composition.

Green blight is the least severe form of blight. It very rarely delves into the rot stage where the skin turns black and decays. More often than not green magic blight is a horrid red rash all over an affected area. If light or dark magic is used it may shift more towards that end of the scale, causing the blight to be lighter or darker as a result.

While difficult, blight can be cured with time. So long as it hasn't reached the point of no return, that is. Blight tends to warp ones mana pool so that it absorbs more of its specific colour; amplifying the process and causing the blight to worsen. Curing blight involves not using that specific variant of magic for quite some time and allowing your body to recover on its own. Because it's a magical affliction, magic cannot cure it. It may ease ones suffering and minimize pain, but magic cannot cure magic.