I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability — S1 E12 - Lloyd's Answer

Guided by Jade’s will, Lloyd deciphers the spell for teleportation. Pushed to the brink, Guisarme unleashes an attack powerful enough to reduce anything to oblivion, the Mortal Dark Sphere. At long last, this climactic magic battle comes to a conclusion.