Fret not! This shikaisen will cure thee of thy restlessness in one foul swoop!
"ワンパンマン" literally translates as One-Punch Man i.e. "I'll do it in one punch, man". Rather than that, I opted for the foul swoop idiom.What? Thou ist incapable of sleeping? Then I shall grant thee the privelege of me sleeping with thou tonight!