Complex sentence: It was soon revealed that Quasar was chosen specifically to combat an unknown threat to Eon's self and the universe, who ended up being Maelstrom, who assumed the aspect of Anomaly.
Split into simpler sentences: It was soon revealed that Quasar was chosen specifically to combat an unknown threat to Eon's self and the universe. The threat was Maelstrom, who assumed the aspect of Anomaly.