The Chain Devil's Death

Moriarty: "How many of those potions did we get downstairs? Just the one, the rest of them got broken somehow. So I don't have that potion on hand" Argo says he's going to cast ice knife again and it hits with 19 plus two damage. He falls to his knees and said, yes, you've defeated me in a worthy battle. Moriarty: "Now my plan is completed and you don't need to worry about it anymore."