User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-73.46.6.122-20150727175623/@comment-79.175.64.126-20150728181819

Oppai beam is evolution from Switch Princess to Super Switch Princess or Crimson Bust Princess. All members of Gremory team got influenced with heavenly dragon power. Akeno have her lightning flame dragons, Kiba has dragon knights and Gasper learned how to use his Gasper Balor form in melee fights shown in volume 18 against Grendels.