[Warm enough to put your hand in without hurting yourself. The mental image of Sans curling up amidst the still-warm embers and emerging coated in ash abruptly pops into their head, prompting an amused giggle.]

Maybe. I guess you'd have to ask about the specifics. I'm...not sure how you start learning that kind of stuff.

[They wonder, fleetingly, how much Asriel learned of his magic before he...

They stop wondering.]

Maybe...maybe there's books in the library too, do you think? Magic is all different across different worlds and stuff, but there might be something there that helps.