Complex sentence: Megatronus, believing that the Cybertronians were the ultimate race and destined to rule the universe and due to his contempt for the human race, chose to ignore this rule and arrived on Earth in 17,000 B.C., where he began construction of a new Star Harvester.
Split into simpler sentences: Megatronus, believing that the Cybertronians were the ultimate race and destined to rule the universe, and also due to his contempt for the human race, chose to ignore this rule. He arrived on Earth in 17,000 B.C., where he began construction of a new Star Harvester.