Complex sentence: The fight culminates at Superman's memorial, where Lois manages to hit the clone with a kryptonite blast, who retaliates by destroying the gun, leaving only the kryptonite canister.
Split into simpler sentences: The fight culminates at Superman's memorial, where Lois manages to hit the clone with a kryptonite blast. The weakened clone destroys the gun, leaving only the kryptonite canister.