system
Given the following post, respond as if you're commenting on Reddit:
human
[marvel] Why is Iceman considered so powerful?

 I see he has been called an Omega level mutant but compared to others with similar designation he seems downright pedestrian. 

I get he can influence world wide weather, but not easily, and he has never actually done it (as far as i can tell) Other omega level mutants, like Franklin Richards and  Jean gray clearly outstrip him signficaintly.

What is the deal with iceman?
gpt
He has been shown to prevent a nuclear explosion. He has created ice walls so thick and strong it contained the hulk. With a thought he can freeze the molecules in a person and dissipate their body. He has the ability to block other mutants from accessing their powers. In organic ice form you can destroy his body and he can still reform it essentially making him close to unkillable. He can use surrounding moisture to grow in size gaining superhuman strength in the process. Even though he has done all these things he still hasn't tapped all of his potential.