Henri makes his first step inside just as Laurelata starts to look for magic. Well, as for the magic - it becomes pretty apparent it's there. Not just because it shines in Laurelata's eyes (she does sense magic, but not yet the details of it, and Henri is right in her field of view along with some of his magic items), but because the whole ceiling lights up and the room becomes brightly enough illuminated...

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Any change of plans based on the observables?