Shaman King Vol 31

Shaman King Vol 31 by Hiroyuki Takei. A Shonen manga rated Teen, published in English by Viz Media.

Yoh Asakura seems like a laid-back kid, but he's actually a shaman who can see and team up with spirits. Paired with the ghost of a legendary samurai, he enters the Shaman Fight, a tournament held every 500 years to decide who will become the Shaman King.