Complex sentence: Donning it, he defeats the Toa with ease and damages their masks, but their efforts give Ekimu the time to recreate his Hammer of Power and defeat the Skull Grinder by knocking the mask off his face.
Split into simpler sentences: Donning it, he defeats the Toa with ease and damages their masks. However, their efforts give Ekimu the time to recreate his Hammer of Power and defeat the Skull Grinder by knocking the mask off his face.