Complex sentence: When a Spider type would normally be killed, it detaches from the host body and attacks on its own, only zealots and militia have this paticular plaga, and is even seen in one area of the game appearing by itself.
Split into simpler sentences: When a Spider type would normally be killed, it detaches from the host body and attacks on its own. Only zealots and militia have this paticular plaga, and can even be seen in one area of the game appearing by itself.