The System continued its explanation as Ethan stood naked, staring at his reflection.
[Functional changes,] the System resumed, its voice clinical. "Those are modifications to your bone or muscle structure. Changes that could significantly increase your strength, speed, or resistance—things like increasing muscle density not necessarily aesthetically, modifying your height, or optimizing your cardiovascular system."
"Finally, mutations. If you wanted gills to appear on your body so you could breathe underwater, that's a mutation. It would be incredibly expensive because it's not just about adding gills; it requires modifying your lungs, restructuring your bones, creating a complex, mixed system that functions with both water and air—essentially, creating a new species never before seen."
