User blog comment:Ixarising/High School DxD Dream Battle/@comment-1359322-20140114055916/@comment-16281343-20140114063451

Come to think of it, Vali uses his normal BB the same way Sairaorg uses his. They just boost their specs.

The last time I saw Vali used his power to divide in a battle is in his battle with Issei in Volume 4.