Leid was baffled by Madam's growth because she could coat her armor and body with thin ice that made her immune to the poison. Not only on the ice, but he also noticed that her strength was superior to his even though his level and skills were a lot better than hers. He didn't know about the blessing that Checil gave Madam that made her a lot stronger.
Madam created blocks of ice around the lair so she could move around no matter how high the beast was. She moved so swiftly that even the beast couldn't target her with the spitfire, and no matter how many times it melted the blocks of ice, she could easily create them back.
"Do you even have time to be dazzled by me?" Madam asked as soon as she landed on the ground and looked at Leid with an annoyed expression. "If you're not going to help, you can leave..." she said and then went up the ice pillar to make the beast come down.