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- "The shouting and the echoes seemed to be driving the troll berserk."
- —Card description
The Troll in the Bathroom adventure card is the nineteenth card of the base set of the Harry Potter Trading Card Game.
The illustration on the card was made by Michael Koelsch, and it depicts Harry Potter and Ron Weasley saving Hermione Granger from a troll in the First-Floor Girls' Toilets.