Prerequisite: The ability to cast spells
Whether from arduous practice and meditation, a freak mutation in you genes, or perhaps delving too deep into The Eldritch truth. you have found within yourself, the ability to break your mind into pieces. Each part, a separate whole.
You can concentrate on two or more spells at once. each spell beyond the first has it's concentration check increased by +5. if concentration on 3 spells, you make a concentration check at the start of your turn, or lose concentration on all spells. on a failed save against the check, take 1d8 psychic damage per level of spell concentrated on. (E.G. if you lose concentration on a level 3, a level 2, and a level one, take 6d8 psychic damage)