Something that helps maintain an elaborate deception involving a pit fiend.
Making Carissa seem like a god to her (ADDED LATE, MAY BE DISQUALIFIED EVEN IF CORRECT)
Something to assist in extracting information from her mind.
Other
A bluff.
Something to prevent her from committing suicide
Something that will do something unpleasant to her if removed, in order to avoid situations where she enters an Antimagic Field or gets hit by a powerful Dispel.
Something to prevent self-deception, in hopes she will realize what awaits her in Hell and voluntarily help them.
Something that helps locating her or bringing her back if she escapes/leaves
Something to impair her in a way potentially useful for multiple purposes, like the abilitystat penalties.
Something else not predicted by any other answer at the time the market closes.
Makes Abrogail's body into a weapon (like a bomb, or plague vector, or something)
Something to further reduce her abilitystats and be removed bit by bit in order to fake Wish-enhancement.
