system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How much force would it take to kill a Kryptonian?

So, um, supposing someone were to, I don't know, kill a certain alien from Krypton, how much force would it take to do that? I know kryptonite or red sunlight could do the trick, but that shit's expensive. Not that I would know, I mean, It's not like I've tried or anything...
gpt
Back in the day, Doomsday (before anyone knew much about the monster) hit Superman repeatedly. The power behind his punches wasn't accurately measured but for all intents and purposes he was a walking extinction level event.

The final blow, which laid the Man of Steel low, went off like a small bomb.... causing glass to shatter from buildings for blocks around the point of impact.

But, to be clear, this was not a healthy Kryptonian he'd struck... Superman stepped in after Doomsday took down the entire Justice League International (mostly with one hand bound behind his back), then everything Cadmus could throw at him, then DD splatted Matrix in her Supergirl form with a single no-leverage airborne punch.

Superman traded blows with him for a good thousand miles.

So I'd say... if you're going for pure force... you need a sustained assault of catastrophic energies.