One of the most out-of-left-field and awesome reveals ever:
Anima: Do you see it? The Anti-Biscuit Hammer Celestial Body Dwarf Counter Weapon. Blues. Drive. Monster.
In chapter 58 Samidare, after the Blues Drive Monster is destroyed, psychically takes over the debris and makes a humongous version of herself and fires the ultimate falcon punch, obliterating the biscuit hammer.
For the series itself, the entirety of the final battle with Animus. And within that the Beast Knights actually beating Animus on their own with minimal help from Samidare.