Demon form

-You merge with your Demon that possess you, you get +5 on DEX, +4 on CHA saving throws and +7 on Stealth +5 sleight of hand.
-Your Immune to Poisen and Petrification
-Nectrotic, acid, and Slashing DMG is halved or roled with disadvantage (Dms choice)
-Radiant and give you additional 1d6 DMG