Complex sentence: After first subject Ellia experiences the opposite of the desired effect ("Instinct"), he perfects it, and tests it on a captured Wraith named Michael, and works, although Michael discovers this and escapes, where he turns Wraith again.
Split into simpler sentences: After first subject Ellia experiences the opposite of the desired effect ("Instinct"), he perfects it, and tests it on a captured Wraith named Michael, and works. However, he finds out of this and escapes, where he turns Wraith again.