Complex sentence: The project began as an autobiographical blog kept by the author, in which he claims to be an ancient monster living mostly on a diet of human flesh, and evolved into a planned book series, social media, and web-based "world".
Split into simpler sentences: The project began as an autobiographical blog kept by the author, in which he claims to be an ancient monster living mostly on a diet of human flesh. It later evolved into a planned book series, social media, and web-based "world".