Unsuccessful Attempt, Amateur

Within his body, David had spread out his divine sense to the maximum. Quickly fixing DNA structures that were about to collapse. 

Suddenly, David felt a change in the genetic make-up of his heart, immediately attracting his attention. He placed great emphasis on all the gene structure of his vital organs such as his heart, lungs, head and others since he didn't want to die so unexpectedly. 

Since all of his attention was in the important ones, he failed to notice as the genetic map that made up his hand was collapsing. Immediately, David's left wrist instantly turned into a pile of mushy dark red liquid. 

It was then David felt that something was off. Quickly, he drank a mouthful of demigod blood. The genetic energy within the blood immediately strengthened cells, making then stronger and resilient, less likely to collapse. Another pair of clean hand grew, replacing the one that had collapsed earlier.