"Here," the first to move was indeed Berry. She moved and grabbed one mould, before asking, "what shall I do with it?"
"Throw its content high," William said in such a surprising manner, "just do it and leave the rest to me."
"Are you sure?" Despite the mould being able to let the melted mix cool down, its heat was still able to harm a bronze spirit master like William.
"Just do it," William confidently said, "and then empty the content of the pots one by one and bring them here in succession. After finishing with one mould, throw another's content for me to handle. As for the emptied pots, continue filling them with the two materials and melt them down."
He planned to keep doing this, and everyone didn't know what he was up to. Just from seeing his brilliant and new to behold move of the hammer, everyone started to slightly change their view on him.
He wasn't trying to put on a show or something. He had a plan and the ability to execute it.