Complex sentence: It was only after Nene's death that Zola's true intentions for gathering the Shadow Wielders were revealed... the evil within Killer Bat corrupts Zola causing her to unleash the darkness that plagued the world.
Split into simpler sentences: It was only after Nene's death that Zola's true intentions for gathering the Shadow Wielders were revealed. The evil within Killer Bat corrupts Zola, causing her to unleash the darkness that plagued the world.