Complex sentence: Doraemon attempts to de-evolve Fenikia into an amoeba using his Transgression Beam, but a struggle with Seagrid's falcon lieutenant Babylon causes the beam to instead evolve the creature into a bigger, stronger version.
Split into simpler sentences: Doraemon attempts to de-evolve Fenikia into an amoeba using his Transgression Beam, but gets into a struggle with Seagrid's falcon lieutenant Babylon. This causes the beam to instead evolve the creature into a bigger, stronger version.