Azareck's World of Imagination

Fill the minds of many with the imagination of a Madman - showing them a world of a chaos that rends the mind.

Choose a point within range; a sphere of illusion magic appears in this space as a sphere, filling the minds of creatures in the radius. Any creature in this sphere must make a Wisdom saving throw. Anyone who fails is consumed by the illusion, transported to a realm of chaos and light reflecting the casters own mind. In this place; time, space and matter are meaningless. The creatures spend 1d4+1 in this space and at the beginning of each of their turns they must make a Wisdom saving throw, on a fail they take 2d10 Psychic damage, on a pass they take half as much. Once they come back they must make a Wisdom saving throw, on a fail they gain a trait of Long Term Madness and are frightened until they can succeed on the save at the end of subsequent turns. If any creatures die while in the illusion they die without saving throws and are transported back. 

At Higher Levels: When cast you cast this spell with a 9th level spell slot, the damage increases by 1d10 and they gain a trait of Indefinite Madness in addition to Long Term Madness.