Tharizdun's Madness

Tharizdun's lust for chaos has impacted your life greatly. This dark grasp has warped your reality and sense of self. You are now able to cast the Find Familiar as a ritual, but your familiar always takes the form of a Will-o'-Wisp. You also have a random form of indefinite madness, determined by rolling on the Indefinite Madness table in chapter 8 of the Dungeon Master’s Guide.