Curse

Curses are defined as lingering magical effects, that come from a place or state of unholiness, and are usually malicious in nature. They are considered to be the ninth school of Magic.
Each curse comes in its own form, some are temporary, some are permanent, some deadly, and some mere nuisances. They each have a different way to cure and get rid of them, although powerful magic is able to get rid of all but the most powerful ones.

Manifestation

They manifest from a place of unholiness - hatred, loathing, hostility - and powerful curses may even bend an area surrounding them to manifest uneasiness to those that pass by it.

Applied Restriction

Curse magic is highly illegal