Complex sentence: He was the original pilot of the Omnigear Andvari and creator of the Yggdrasil I-IV. Roni went on to found the desert kingdom of Aveh and become its first king.
Split into simpler sentences: He was the original pilot of the Omnigear Andvari and creator of the Yggdrasil series. Roni created the desert kingdom of Aveh and become its first king.