Mordenkainen's Lost Notebook

Prismatic Aura

6-level Abjuration

You surround yourself with a flashing aura of multiple colors which obscures your image. You are lightly obscured. In addition, any creature that hits you with a melee attack must succeed on a Constitution saving throw or be subject to a random prismatic effect as though affected by a prismatic spray spell; reroll any result of 8, since a prismatic aura can’t generate two effects at once. Each time an effect is expended, that color disappears from the aura (reroll if it comes up again on the table). A prismatic aura can thus affect a maximum of seven attackers before the spell ends.