Complex sentence: Satan Goss in his armor is visually similar to Darth Vader, but in giant scale; next to the end of the series, he loses his armor and transforms into The Might Satan Goss, thus possessing a Cthulhu-like appearance.
Split into simpler sentences: Satan Goss in his armor is visually similar to Darth Vader, but in giant scale. Next to the end of the series, he transforms himself into The Might Satan Goss and possesses a Cthulhu-like appearance.