Episode: Sousou no Frieren - S8 - Magic Episode 7: Magic to Speak Extremely Fast Without Faltering 11344b

Frieren and Heiter try the spell out on the taciturn Eisen. At first the spell doesn't seem to have worked, but when they ask him about a recent battle, both his speech and his movements increase in speed. Frieren and Heiter conclude that it's good for people to have their own manner of speech.