Complex sentence: He is said to have shaggy and messy black hair, olive like skin, black eyes, and wears all black, and by the end of the Battle of the Labyrinth, a skull ring.
Split into simpler sentences: He is said to have shaggy and messy black hair, olive-like skin, black eyes, and wears all black. By the end of the Battle of the Labyrinth, he also wears a skull ring.