2x7 - Superb Song of the Valkyries: Symphogear

Kirika and Shirabe attempt to recover Dr. Ver so that he can treat their mom. They run into Hibiki, whose fusion has progressed to the point where she can fight a Noise with her bare hands. Dr. Ver injects them with a LiNKER boost, and they attempt to use their Superb Songs, which might kill them.