Complex sentence: Goldar has the upper hand on them at first, but when Jason calls on the Power Sword, Goldar, afraid of being destroyed, retreats to the safety of Rita's palace, where the angry sorceress harshly reprimands him.
Split into simpler sentences: Goldar has the upper hand on them at first, until Jason calls on the Power Sword. Afraid of being destroyed, Goldar then retreats to the safety of Rita's palace, where the angry sorceress harshly reprimands him.