<span class="mu-s">Charisma (Deception) Check - Advantage: Convince the creature that you're here on official business with the Abbot.</span>
Roll 2d20 and discard the lower roll to perform a check with Charisma (Deception) with Advantage - Aranuel's Charisma modifier is +0, so no change.
(Best out of 3.)
The roll has advantage due to the plan described in this post:
>>5278074.