User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-43933896-20191026211813/@comment-29963364-20191027031948

The second picture isn't the Abyss Side BxB, it's just the normal one.

Biblical God used two "sources" when creating Canis Lycaon:

1.) The King of Arcadia, Lycaon who accumulated evil deeds toward the Chief God of the Greek Faction Zeus, invoking his fury resulting in him being turned into a werewolf.

2.) The Ame-no-Ohabari, the strongest sword among the Totsuka-no-Tsurugi, which attained divinity and was later used to kill Hinokagutsuchi.

Once both were sealed in Canis Lykaon, the curse of Lycaon caused Ame-no-Ohabari to lose its divinity and transform into a cursed blade.

What you see in the second picture is just Tobio unlocking a "hidden aspect" of his normal BxB. He's able to summon the sword that killed the Shinto Fire God, Hinokagutsuchi. The cursed sword grants him the ability to use the power of the Fire God, summoning and controlling red & black colored flames.