What an absurd plan, it isn't like the skeleton cause the snow and ice to exist in the first place. At least, aside from the way that the setting of their shared dream is from his memories. This ice didn't do anything to him.

"Yes, I am a skeleton! A living skeleton! It's so very good of you to remind me of that. I might... have forgotten?" It's a bit of a stretch, and it takes a little effort, but Papyrus manages to interpret Xanxus' response as a compliment. "If you're not a dog, why do you think I'm revenge for some other bone???"