The Demon Crown

The Demon Crown is a mysterious crown of unknown origin that was given to Akuma-Ara by his brother, Akala. The crown is made of the very same stone that covers Shimetsukeru, Brimstone. A visible red aura emanates from the stone when it's not being worn. Once an entity places the Demon Crown on its head, it will immediately be considered the Demon King, this applies to even Gods (However, the process of transformation is far longer for Gods). The Demon Crown is completely indestructible and cannot be destroyed by any means (even Ataraxia).

The Demon Crown allows any entity that wears it to manipulate the will of Demons. However, a Demon that has previously worn the Demon Crown is completely immune to its effects (ie. Akuma-Ara after having the Demon Crown removed). Additionally, removing the Demon Crown from a wearer is extremely difficult and painful, regardless of pain tolerance. A Demon who has not worn the crown for long (ie. Namix Akiyama) will fall into an unconscious state for a week, and when they awaken, will not be aware that they were ever unconscious.

Once a Demon King has been removed of the Demon Crown, they will no longer age or be able to die of natural causes (according to Nox).