User blog comment:B214/Question and Answers 2/@comment-82.178.74.96-20140201113221/@comment-16281343-20140202070746

It seems like he gained a new SG where all of the abilities of the four are included.

And Vritra Promotion is like JD or BtB, albeit without the harmful effects except of him going berserk but with the possibility of controlling it in the future. Since in that state.. it kinda looks like Vritra himself is fighting.