Complex sentence: In "The Final Ending", Cosmo is angry with the Lead Eliminator, who constantly attacks his family and godchild, so he transforms into a giant creature named "Cos-zilla", a reference to the Japanese movie monster "Godzilla".
Split into simpler sentences: In "The Final Ending", Cosmo is angry with the Lead Eliminator, who constantly attacks his family and godchild. As a result, he transforms into a giant creature named "Cos-zilla", a reference to the Japanese movie monster "Godzilla".