Arc 4Blood King’s Release
Fanxin escaped the Blood King’s tower, gained Wolf Valley and joined Luffy’s group after helping defeat the Black Cat Pirates. He then gave up his body to obtain part of the Blood King’s soul, freeing the Blood King and leaving the two poised to fight.
- Fanxin flooded the tower and lured Sea Kings to attack the Blood King’s sphere, then entered the ninth floor and offered his body in exchange for Wolf Valley.
- Fanxin let the Blood King enter his mind, while Langyue awakened the Wolf God, who gave Wolf Valley to Ren Fang and bestowed God's Protection on Fanxin.
- Fanxin’s group left the island with the Iron Clan, reached Syrup Village, and encountered Luffy, Zoro, Nami, and Usopp before government agents attacked them.
- Fanxin and his companions defeated the agents, and the Giant Dragon explained that Fanxin’s Soul Clan heritage made his brain domain indestructible and outlined a plan to defeat the Blood King.
- Fanxin’s group joined Luffy’s crew in stopping Kuro and the Black Cat Pirates from taking Kaya’s property, and Luffy drove Kuro away before Merry gave the crew the Going Merry.
- Fanxin fought Zoro to a draw, then exchanged his body for part of the Blood King’s soul and left his body as the Blood King took control.
- Fanxin confronted the Blood King as Ren Fang took the Going Merry away, and Luffy, Zoro, Langyue, and Little Black Cat joined the fight while the Blood King countered Fanxin’s attacks with a blood-red dragon.