Kumo Ringu

Kumo Ringu (雲のリング, Cloud Ring) is one of the seven legendary rings forged by using a legendary wolf spirit. Its main ability is Weaponry, it also allows the user to open cloud type boxes. It takes the form of a ring which emitts a purple flame when ignited using spiritual energy.

Powers
Weaponry: This ring allows the ability of weaponry, which means the user can use the ring to instantaneously produce weapons to appear in the users hand or to appear near the enemy ready to attack. The more weapons and stronger weapons he produces uses up much more of his spiritual energy.

Cloud Box Unlocking: This ring allows the user to open cloud type boxes. This is the only ring which can open cloud type boxes as it was the only cloud ring made.

Behind The Scenes
This was based off of Katekyo Hitman Reborn's seven elements.