Originally posted by Stoic
What if they placed him in a room that emitted red sunlight? Dr. Doom can use the Crimson bands of Cytorrak too.
We’ve seen Superman operated after being weakened though.
Best I can think off was Morrison’s new 52 Action Comic where Superman was being attack in the present and future, while weakened from K-nite, while fighting a being that becomes more powerful the more you think of him.
And that Superman wasn’t even his most powerful.