Complex sentence: Fox says he will use the machine to help find the Joker, but Wayne should consider it his resignation as cannot work for him while such technology exists; however, Batman riggs the machine to self-destruct after its only use.
Split into simpler sentences: Fox says he will use the machine to help find the Joker, but Wayne should consider it his resignation as he cannot work for him while such technology exists. However, Batman riggs the machine to self-destruct after its only use.