|Thunder of the Night Sky|
|Magic system||Ancient Belka|
|Japanese name||夜天の雷 |
(Yaten no Ikazuchi)
|First app.||The Battle of Aces|
Apparently it has similar effects to Diabolic Emission. Reinforce strikes her opponent with a compressed black sphere of energy, causing it to expand to surround both characters and remain at a fixed size. She then fires a bolt of white lightning at her opponent, causing the sphere to shatter.