User blog comment:B214/Volume 22 spoilers/@comment-207.96.205.3-20161013163608/@comment-26345952-20161015022602

That is true. 666 was already powerfull enough that it took God various high level forbidden seals just to keep it restrained. Rizevim only gave it the ability to command and reproduce fake Sekiryuuteis.

But I gotta wonder. Since the supernatural world has contain and erased all if not most of the evidence of the attacks of 666, if Issei transforms into his Balance Breaker, would anyone remmember and confuse him with the fakes of that event?