Complex sentence: It easily defeats A-Class heroes Golden Ball and Spring Mustachio, but is defeated by Saitama who had randomly encountered him after a grocery shopping trip, and is stripped of all its tentacles to make "kombu" soup.
Split into simpler sentences: It easily defeats A-Class heroes Golden Ball and Spring Mustachio. However, he is defeated by Saitama who had randomly encountered him after a grocery shopping trip, and is stripped of all its tentacles to make "kombu" soup.