Huh. I don't believe I've ever run into a story that went that route - the usual topic when "Marisa went and turned herself immortal" comes up is "Now she has to give back Patchy's books, because 'you can have them back when I die' isn't fair if you aren't going to", which I didn't realize until I typed that sentence was curiously relevant to the topic of this excerpt.

(For that matter, I don't think I've ever seen those three spells mentioned either, but maybe that came up after I largely stopped paying attention to the franchise, or in non-game media that I never looked at to begin with. I have, however, seen many stories of youkai of all kinds both eating and sleeping...)

-IA.

(received information not interpretable)