Chō-Senjiryakketsu

The Chō-Senjiryakketsu(超占事略決) is an ancient book written by Asakura Hao during his first life.

Spells
Using this spell enables one to read the flow of furyoku and determine its course. Effective use can render most furyoku attacks ineffective.
 * Chō Senji Ryakketsu - Fumon Tonkou(超占事略決 - 巫門遁甲, chou sen koto ryaku ketsu - fu mon tonkou)

This was a secret exorcist magic left to Yoh by Matamune, to help vanquish the Oni that Anna created. However this technqiue depleted the reserve furyoku within Matamune, and as a result, sent him to the hereafter.
 * Chō Senji Ryakketsu - Mikazuka no Harae(超占事略決 - 三日月ノ祓, chou sen koto ryaku ketsu - mikaduki no futs)