Complex sentence: Satyarani, who governs the rules of the challenges, decrees that a warrior may be brought back in exchange for eight jewels, should the team choose to do so; however, this may only occur once for each warrior.
Split into simpler sentences: Satyarani, who governs the rules of the challenges, decrees that a warrior may be brought back in exchange for eight jewels should the team choose to do so. However, this may only occur once for each warrior.