The way the fire flowed, the temperature, the intensity, those were the only things Sasha could think about right now. With the previous metal ingot as proof, Sasha knew that the next ones would only be more difficult, and that would require all of her skill and concentration.
Taking the next ingot and the next medicinal herb, Sasha frowned. The medicinal herb this time had a strong corrosive essence, and the metal was even denser and heavier than before. A quick guess told Sasha that this particular metal would require extreme temperatures to reach its point of smelting, which would be difficult to achieve without even affecting the medicinal plant.
Though Qiqi didn't explain it, Sasha guessed that if she corroded the metal instead of melting it, that would mean disqualification, so she had to melt this metal ingot while preventing even the slightest trace of the corrosive plant essence fell on it.