Complex sentence: After a long fight, Gamera eventually managed to defeat the knife headed beast by flipping him upside down-his blade stuck in the earth-then igniting a missile that had gotten stuck in his circular indents, blowing his head off and killing him.
Split into simpler sentences: After a long fight, Gamera eventually managed to defeat the knife headed beast by flipping him upside down, his blade stuck in the earth. Gamera finished Guiron off by igniting a missile that had gotten stuck in his circular indents, blowing his head off and killing him.