User blog comment:B214/Question and Answers/@comment-119.160.168.204-20130309130539/@comment-5185939-20130310205438

We don't know, but probably it's the most powerful weapon in the Balance Breaker arsenal. Most likely it's at least as powerful as the Mega Smasher from the Guyver manga series, and possibly powerful enough to kill gods once Issei comes into full power.

To put it simply, it's one of the most powerful weapon/attacks in the series.