system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman] What is the easiest way to Kill a Kryptonian?

Completely hypothetical I have no wish to do harm to any Kryptonian at the moment. However they do pose a rather serious threat so what would be the easiest way to kill one if I was say a billionaire with a lot of friends in high places.
gpt
Easiest is relative, but the most reliable way would be a red-solar lamp to weaken them, and then some sort of kryptonite blade to finish them off. That's assuming you don't have access to anything magical.