Rare Success?

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Was this a rare success on the level-10-case? Victory for the Matron! yields:

You've gained 5 x Mirrorcatch Box

You've gained 200 x Moon-Pearl You've gained 6 x Journal of Infamy You've gained 7 x Dubious Testimony You've gained 1 x Sworn Statement

Mirrorcatch Boxes can otherwise be a pain to get, so this looks...unusal

El Mar