Embody Fiendish Spirit

You invite a fiend to temporarily inhabit your body, letting you draw on its knowledge. You gain an expertise die on ability checks relating to knowledge about fiends and their native planes, as well as two skills determined by the type of fiend you choose. You radiate the same alignment aura as the spirit, and count as having its creature type in addition to your own. The spell ends if you are successfully targeted by an effect which would return the spirit to its native plane, or end its possession of a creature.

You feel a compulsion to act in line with the nature and alignment of the spirit. When you act against the spirit’s nature, or at the Narrator’s discretion, you must make a Wisdom saving throw to resist these compulsions.

Additionally, after speaking with a creature with an Intelligence score of 3 or higher for at least a minute, you can force them to make a Charisma saving throw. On a failed save, you learn secret information you can use to manipulate them. Choose one of the following options.

Infernal Cunning (devil; Lawful Evil): You gain an expertise die on Persuasion and Insight checks. On a failed save, you learn something the creature desires.

Fiendish Terror (fiend; Neutral Evil): You gain an expertise die on Intimidation and Stealth checks. On a failed save, you learn something the creature fears.

Abyssal Wrath (demon; Chaotic Evil): You gain an expertise die on Athletics and Deception checks. On a failed save, you learn something that would make the creature lose their temper.