User blog:Disfigure/This was only shown in the Anime about Guren Ichinose

During the final episode of Seraph of the End: Battle in Nagoya, remember when Guren's demon weapon undergo a different color change from black to full red, doesn't it work similar to how a first-class vampire weapon does it?

Upon drinking their blood, the first-class vampire weapons used by Crowley, Mikaela, and Lucal both change its standardized color to being purely red. The same could also be coincide with when Guren stated about drinking the blood of a human, a demon, and a progenitor, his demon weapon has also underwent the same transformation in terms of color scheme as red.

The question is, does Guren's demon weapon, Mahiru-no-Yo holds some close connection to how the progenitors and Mikaela used the functionability of their first-class vampire weapons like asking it to "drinking blood?" Now that I mentioned it, I think possession-type curse gear weapons are exactly similar to the first-class vampire weapons in terms of enhancing their feats.

That is why I think that the chance of Possession-type cursed gear weapons (Black Demon Series) were originally modeled after the First-class vampire weapons when it comes down to enhancing one's strength and power.

On the other hand, I think the one thing which Guren's demon weapon differentiate from the first-class vampire weapons is that he required not his own blood, but the blood from other humans, demons, and progenitors besides himself for it to undergo a change of color like red.