Body tempering consisted of blood purifying, bone thickening, marrow cleansing, muscle building, and meridian strengthening.
Once a mortal body successfully achieves this feat, it could be said that the cultivator has now stepped into the martial realm.
Without an adequately tempered body, the excessive cultivation base, soul strength, and mental strength would soon start corroding the bones and tissues.
So this step was a must before stepping into the martial realm.
One could even skip out on upgrading their soul strength or mental strength, but without improving their body's state they can never truly cultivate.
Not to say that improving soul strength or mental strength is not important. Everything had its own benefits and drawbacks.
Tang Yue sat cross-legged on the dirty floor of the alchemy association practice chamber, mostly dirtied by the sweat and gunk leaking out of Tang Yue.