User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-39047410-20190819232412/@comment-39047410-20190820005039

Abilities in AxA. 1. Revelation Barrier: powerful barrier surrounds Ryuuteimaru. Tartaros' attacks are unless against it. 2. Revelation All-Range Blaster: many guns shot at the enemy. Tartaros' defence magic circle was broken by this like a paper according to Issei's words. 3. Revelation Blade: upper and lower parts of Ryuuteimaru changes and four arms appear with aura blades. Issei claim these blades as Apocalypse Ascalons. Arms move in accordance with Issei's thoughts. With blades he could easy cut Tartaros' arms. Issei held back during his fight with Tartarus so he wouldn't destroy Georg's Balance Breaker Barrier.

Hidden Khaos Bridage (Followers of Khaos Brigade and Qlippoth) allied themselves with Erebus' group and that Nebiros is also with HKB