Complex sentence: Precht is one of Yuri's treasure hunting companions, and Mavis's future successor as Fairy Tail's master who eventually dubs himself as Hades, a prodigious dark wizard and leader of the dark guild Grimoire Heart.
Split into simpler sentences: Precht is one of Yuri's treasure hunting companions and Mavis's future successor as Fairy Tail's master. He eventually dubs himself as Hades, a prodigious dark wizard and leader of the dark guild Grimoire Heart.