Forceful genetic transmutation.
The ability to change the genetics of something before him, by rewriting its DNA in order to get a certain outcome. On Earth, that was the point of the healing factor drug. A drug that could quite literally rewrite the genetics of a human to give them eternal youth and complete resistance to all types of disease and illness.
Of course, that backfired horribly. Silas still didn't understand why it had gone out of control like that. It's almost like it was tampered with, but he knew that wasn't possible since he was the only one with the knowledge of the life equation.
Maybe humans weren't ready for such powers? But the same could not be said for a world with magic—a world with mana, and creatures that had adapted to that very same mana.
Plus, the genetic transmutation wasn't being performed on anything alive. Just organic... A Gilea-level feat, one might say.
The Discord link can be found in the synopsis.