Complex sentence: Not long after returning to Alba, however, the Cruarch is overthrown, murdered by his own son Maelcon, who seeks to end the system of matriarchal rule and claim the kingship for himself.
Split into simpler sentences: Not long after returning to Alba, however, the Cruarch is overthrown, murdered by his own son Maelcon. Maelcon seeks to end the system of matriarchal rule and claim the kingship for himself.