Shaman King Red Crimson

Shaman King Red Crimson (シャーマンキングレッドクリムゾン) is a manga series by Jet Kusamura and a spin-off to Hiroyuki Takei's Shaman King series. The chapters are serialized in Shonen Magazine Edge magazine.

About
Hoping to borrow money to restart his failing fuki farm, Horohoro goes to visit Tao Ren. On the way, he is attacked by a Jiang Si using member of the mysterious "Red Crimson" organization. After being saved by Tao Jun and Lee Pyron, he learns of the conflict between the Red Crimson and the Tao clan, and of the Iron Maiden's death.