C76 Body Tempering Seventh Layer

When Tang Ao returned to his room, he immediately sat cross-legged and entered into cultivation.

Tang Ao's perception was very high, and coupled with his two lifetimes of mental strength, Tang Ao quickly memorized "iron sand" backwards. That very night, he cultivated "iron sand" to the first four levels.

[iron sand] was a top-notch technique below the level of The Origin Martial realm