Green Kryptonite

[LordVenoc]

I think having radiation lumped in with it becomes where the question is harder to answer. Because like, Light Damage is essentially radiation. And they're obviously resilient to light. This is just a particular form of radiation that only affects them, so lumping that in would create a situation where someone lands in a weird thematic place of being "sort of" immune to Kryptonite if they were to have Toxic resistance, whereas not having it is merely cutting an extraneous element that will have no mechanical benefit aside from the like, self-congratulatory "We kept it consistent."

They already have an Item Type going on, so all those things can still interact with them, and would have to reference the Kryptonite element because they'd need to do more than just ignore the toxic wound.

And all this very much likely comes across as this mattering to me on a major level. Its not a big deal. It just feels extraneous and more likely to cause issue than actually provide a mechanical benefit from a design perspective.