Complex sentence: This is where Serpentor creates his "Snake spears" from, which, if they miss, degenerate into cobras which slither away, if they hit, the snake spear kills its victim.
Split into simpler sentences: This is where Serpentor creates his "Snake spears" from which, if they miss, degenerate into cobras which slither away. Tf they hit, the snake spear kills its victim.