The Craftsman hammered down onto the hot metal that he created from one of the eggshells. Even Eiro could tell that they all had slightly different properties to each other, depending on which child's egg they came from.
Eiro wasn't entirely sure, but considering that Armodeus preemptively split the metals up into smaller pieces made the Demon think that Armodeus already had specific plans for everything. Right now, he was working with the metal created from the Frost Dragon's egg.
It gave off a slightly chilly feeling, as if a cold breeze ran over Eiro's skin. At first, the Demon wasn't sure what exactly that metal was actually supposed to turn into. But for now, it didn't even turn into anything yet. Armodeus was still just preparing all the different metals to work with them later on. He was even mixing some parts together, folding them into each other after heating them up, without actually evenly mixing them.