Complex sentence: Iskandar implants in Yuki the ability to clean the radiation from Earth, and as she and Kodai return to "Yamato", Saito and Sanada sacrifice themselves by destroying the Gamilas power source.
Split into simpler sentences: Iskandar implants in Yuki with the ability to clean the radiation from Earth. As she and Kodai return to the "Yamato", Saito and Sanada sacrifice themselves by destroying the Gamilas power source.