Reimyaku (Seireitou)

Reimyaku (霊脈, "Spirit Pulse"), known in ancient times as the "Dragon Veins" (龍脈, Ryūmyaku), is the spiritual energy of the world. It is likened to a natural form of which pulsates from the realm. Each world has its own spiritual pulse, such as the. and are both combat styles that can make use of the reimyaku.

Utility
According to, the members of the have their  fused together with the reimyaku of the. Because of this, so long as the palace exists in some form or another, Ichibē is able to revive them even from the brink of death by calling their names. Their lives are linked to the palace, and as such, they are incapable of dying; such is their fate.

The ninety-ninth spell,, is said to possess tremendous power in comparison to the other forbidden  spells because it creates dragons of  from the reimyaku of the earth. When it was performed by, he circulated his Hadō into the atmosphere and hacked into the reiatsu of the souls being manipulated by ; utilizing that reiatsu as a substitute for the reimyaku of the Human World.