Complex sentence: She is selected as the savior of both worlds as she saved Helios from being swallowed by a magical whirlwind while Helios was using his limited power to search for the savior.
Split into simpler sentences: She is selected as the savior of both worlds as she saved Helios from being swallowed by a magical whirlwind. This happened while Helios was using his limited power to search for the savior.