Although I didn't have to concentrate super hard on the Proto-Core I was making, since it was mostly stable, I could still easily fail right now.
And even die.
I used the concentration and Qi I had to activate the Life Flow technique. The flow of Life energy through my body revitalized me, improving my ability to concentrate again.
Then I took a knife, removed my upper body clothing, and began cutting.
The knife sank under my ribs. This barely stung, but I kept cutting deeper. From there I was digging up, carefully avoiding meridians to reach my heart dantian with as little trauma as possible.
After a minute of cutting, I had to bite my lip to keep my hands steady. The Life Flow clotted the blood vessels at the cut, so I didn't bleed out, but I couldn't let it heal me fully.