Hand of Confinement!
Currently, Huai Shi was continuously transforming his Source Substance into iron. As the flames surged obediently, the material of countless grains of Iron Sand began to change rapidly, eventually turning into a pitch-black color, like crystal. After absorbing a great amount of Apocalypse, it took on the properties of Shadow Iron.
Amidst the flames' forging, a misshapen Dagger slowly emerged.
In the end, as Huai Shi's Source Substance was completely expended, the flames dissipated, and the Dagger fell into his hands.
Huai Shi examined this creation, unable to hold back his excitement.