"You could do that." Senku agreed with a bit of a nod. "If you wanted steel or something, it would be hard without a forge, but finding something else to make a guard might be beneficial, if it can withstand the heat. Your flame didn't change colour, so you're still under 1300 degrees." He told him. "So if you're considering options it has to be in the metals, and you need at least nickel or better, to avoid damaging the hilt. Anything else and you'll probably end up in a similar situation."