Complex sentence: Ruber uses the potion to meld Excalibur to his own arm and using Kayley as a bargaining chip, Ruber forces Julianna to gain them entry to Camelot, Kayley frees herself to warn them and a fight breaks out.
Split into simpler sentences: Ruber uses the potion to meld Excalibur to his own arm and using Kayley as a bargaining chip, Ruber forces Julianna to gain them entry to Camelot. However, Kayley frees herself to warn them and a fight breaks out.