Magic for Chaos
This is a forbidden or dangerous type of magical school whose goal is to promote chaos, which will lead to an evil tyranny. 1 of the primary sub-schools of "chaotic" magic is one that follows the little-known archaic rituals and beliefs based on the existence of the Elder Gods. This type of magic is much more powerful in certain settings (such as ancient temples to the unknown gods) and with the use of "chaotic" magic artifacts. The vulnerability of "chaotic" magic is that it tends to attract "white" magic wielders or creatures who wish to negate it.