Shaman king - Hiroyuki Takei

There's no time for slacking these days as Yoh and his friends race to the rescue of their one-time rival Tao Ren! Ren's dad has strict ideas about how a Tao should behave, and Ren's recent rebellion has earned him a stay in the family dungeons. But Yoh's influence has already started to wear off on Ren, who now has a new weapon against his father's terror tactics, and a group of friends to back him up! But the Tao stronghold is a strange and dangerous place, full of fear and monsters. Will friendship be enough to counter the bloody Way of the Tao?