Devastation

Devastation (荒廃,Kōhai), is a power shared by Rory Mercury the Apostle Demigoddess of Death and Emory the God of Death. It gives them complete control over the power of Death as they can kill a person with their powers Abilities/Techniques as they see fit. This grants them authority to rule the Land of the Dead as the Rulers of Death.

Description
Devastation was first shown as a power that allowed Rory Mercury to completely destroy her surroundings in one go when she was fighting Gilthunder in the Forest of White Dreams.

During her match with Howzer, Rory was seen using her power to make his joints malfunction rotting them with her magic.

Merlin and Gowther both commented how much of a beast she was in battle regarding her power, and she was capable of using her power to rot the land around her sucking the power in to use as a beam to destroy the landscape around her.

It is confirmed later by a dead Emory that her power over death was a condition of his and Rory`s merged bloodlines. She later obtained Elaine`s powers over wind and used them to such great heights she was eventually regarded and labeled as a member of the Apostles a former group of Holy Knights that betrayed the kingdom.

Techniques

 * Silver Spears of Emory [エモリーのシルバースピアーズ,Emorī no shirubāsupiāzu); literally meaning "Silver Spears of Death"]: Using this technique Rory is able to encircle her opponent cornering them and she is able to kill them with this technique.
 * Ray of Obliteration [レイオブライトオブライト,Reioburaitooburaito); literally meaning "Ray of Absolute Destruction"]; Rory rapidly gathers half of her magic power into a small ball in her hand and rapidly chants in a never-ending circle. When she is finished with her rapid chanting she floats into the air and throws the ball of pure magical energy at her enemies. This technique demolishes everything in it`s path and leaves nothing standing.