Complex sentence: Kakashi plans to merge with the dark entity known as the Maryuu to become human and live amongst humanity, however, Judam took his special scale to merge with Maryuu and the duo fly off from their Halloween-themed fortress to search for Judam.
Split into simpler sentences: Kakashi plans to merge with the dark entity known as the Maryuu to become human and live amongst humanity. However, Judam took his special scale to merge with Maryuu and the duo flies off from their Halloween-themed fortress to search for Judam.