Complex sentence: Meik and Brood, who have form a connection due to their insect nature, freed Meik's brothers and adding the Warbound to his Hive, within a short time he underwent a metamorphosis and became a King, a giant heavily armoured version of his race.
Split into simpler sentences: Meik and Brood, who have form a connection due to their insect nature, freed Meik's brothers and adding the Warbound to his Hive. Within a short time he underwent a metamorphosis and evolved into a giant heavily armoured "King" version of his race.