"it's like this..this really overwhelming feel that gets your blood pumping, ya know?!" asta replied, trying his best to describe it. both of you learned that your grimoire do the same thing. where you both can channel magic and use it over your body. almost like a devil. he was the first to do so, and you almost did it in battle once. now, he's trying to teach you. but he's not the best at doing that. neither is he good at explaining.