Kettou Jouken

A is a special ability or trait attained by Demons who have achieved a Vermillion Form or have evolved into an Arch-Demon. A kettou jouken can be passed down to another Demon below the original bearers own evolution. The recipient of the bearers blood will slowly develop the same kettou jouken as the original bearer, however, a kettou jouken that has already been passed down cannot be passed down by a recipient. Despite its benefits, the recipient of a kettou jouken bearer's blood can no longer evolve into an Arch-Demon. Some kettou jouken require activation, like the Sanjigan; others are merely passive or permanent additions to an already existing ability, like Fumetsu no En and Kotsu no O. When paired with the Demon King, however, the number of kettou jouken they can obtain is limitless, this effect is restricted to only the current Demon King at the time.

Click here for a full list of kettou jouken.