system
Given the following post, respond as if you're commenting on Reddit:
human
[DC/Superman] Kryptonian seem extremely overpowered when they are on Earth due to the sun, what other species are there that are extremely powerful in right conditions?

So I was always amazed at how just one Kryptonian human was basically the Superman we know and love. One out of a planet full of them. So that makes me wonder if there are other beings out there who, in their own planet might not be all that special, but under certain conditions they too become "superhuman".

Like, maybe someone who breathes in oxygen and becomes indestructible? Someone thrown in the water realizes they become immortal as long as submerged?
gpt
Humans are more powerful (basically Superman level) on ZurEnAr due to breathing the atmosphere.  Martians are actually less powerful on Earth and would likely be extra powerful on an oxygen free planet.  Medphyll finds himself more powerful on Earth but it's nowhere near as significant a boost as Superman and it's due to his magical abilities which aren't inherent to his species.  The situation you are asking for is pretty rare though.  Kryptonians were basically custom designed by two malevolent beings for the exact situation Superman found himself in.