I couldn't finish 'em. Looks like this's gonna get complicated.
Right Arm is a boss in Final Fantasy IV: The After Years. It is part of Baigan. If not defeated after Baigan is defeated, it will use Self-Destruct to deal its remaining HP to a party member. Otherwise, it will constantly attack with Bloodfeast to inflict Sap on a party member. It is not a difficult enemy to defeat, but will regenerate if defeated before Baigan is defeated.