Air Stigmata

Air Stigmata, also known as Breath of The Sky Dragon, is a dragon-type Sacred Gear, appearing during the countinuity of DxD: Next Generation.

Sealed inside is The Sky Dragon, Rayquaza.

Summary
During the events of the Dragon Festival, Rayquaza along with Zekrom fought against the new angel leader Kazfiel and lost. Sharing his fate with the other dragons, he was sealed into Air Stigmata.

Abilities
As with the other dragon gears, which specialize in an element, the same goes for Air Stigmata, which dominates and controls air, wind, and oxygen in general.

Able to bend and shape winds however the user wants, the gear is very adaptable as it can form blades or blast out the compressed air. It also capable of bending the wind around the user, allowing flight, and even creating stepping stones.

A unique ability it has is that it can suck all the oxygen out of a creature, and instantly kill it. To use this ability however, the wielder most have a high level of control over the Gear.

Forms
Having no physical forms, the use of Air Stigmata is shown with green, emerald rings around the user's eyes. It is also shown with a glow around the hands, or even feet.

Sky Guardian
Sky Guardian, also known as the Lord of Wind, is the Balance Breaker of Air Stigmata. Sky Guardian is a lithe, golem-like being made of condensed winds into a solid form. Sky Guardian shares the abilities as it's wielder, able to control the wind, and also bearing a set of wings and a single blade, formed out of wind .

Trivia

 * This Sacred Gear and dragon are based on Rayquaza, master of the weather trio, and mascot of Pokemon Emerald.
 * The Sky Guardian BB is basd on the Spirit of Wind, from the Shaman King anime/manga.