The progress would turn even faster after they strengthened the heart, increasing the capability to a new level.
But this method had its risks; even with mana, everything had to be done quickly.
With Qi, it needed to be done even faster.
Since the blood carried Qi and mana in it, as time passed, if they didn't strengthen their whole internal organs, it would instead damage their body, rupturing their veins and creating internal bleeding that could result in death.
After infusions with the bone marrow, lung, and heart, the next organ they needed to strengthen was the kidney.
This would enhance the cycle even more, raising their strength to a new level.
Since the kidney would filter through the mana and Qi, making them purer, this made Alex wonder if he could change his kidney to harness life force.
However, Vesa dismissed the idea.
