Raitoningu Ringu

Raitoningu Ringu (ライトニングリング, Lightning Ring) is one of the seven legendary rings forged by using a legendary wolf spirit. Its main ability is Paralysation, it also allows the user to open lightning type boxes. It takes the form of a ring which emitts a green flame when ignited using spiritual energy.

Powers
Paralysation: This ring allows the ability of paralysation, which means the user can use the ring to ignite weapons or his fist to paralyze the enemy. It also can be used to amplify lightning type moves.

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

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