This trial necessitates a battle against a duplicate of your party. To simplify the encounter, undress your characters before offering blood to the ritual bowl, and then re-equip them just before the battle commences. The clone team possesses the capability to move in and out of the shadows.

Moreover, each time you strike a clone of a party member, that member will be afflicted with a debuff that decreases their ability scores. Defeating the clone will eliminate this debuff. Following the battle, you can retrieve the Killer’s Sweetheart ring from the ground.

How to complete Self-Same Trial