User blog comment:Alcahona1095/High School DxD BorN Episode 11 Review/@comment-195.189.88.79-20150614082626/@comment-3965848-20150614084121

I think it was an incomplete Scale Mail, after all it was one small shard out of a whole armor, so the power to manifest the armor is very limited to what we saw in the episode.

At least that's guess.