You literally transmute matter at will, you do not need to fight Killcannon just turn his robot arm into cheese or something. Your nemesis is a villain that you do not need to consider the whole cannot effect living tissue thing for even a second. That is all.
I’ve argued this before …
When a nuke detonates the split nanosecond before an explosion… What if eve turned the sandwich in a villains stomach into that …
Boom…that’d kill anyone on the show.