18:00 Between boxes #8 and 9 there is 1 Mimic and between boxes #4 and 5 there is the 2nd Mimic; threrefore, because both boxes #1 and 3 are agreeing they both can't be Mimics (and you did open them) but then you left.😢 If the remaining red box #5: "There is no Mimic among the blue boxes." is truthful, it means all 3 red boxes are Mimics but that contradicts itself - so it's a Mimic. That makes box #9 truthful and box #8 the 2nd red Mimic. The last red Box #6 can't be a Mimic because that would make all 3 red boxes Mimics, so box #6 is truthful and that makes box #4 truthful and the last remaining box #2 the last Mimic.

Seeing you buy the Charm on the floor before the final boss was kind of painful lol

29:57 *_Already_* opened truthful box #5: "There is no Mimic among the black boxes." Blue Crystal to sleeping black box #8: "Wakey wakey!"

At 23:00 the top blue box is not a mimic, as the bottom one contradicts it and is the same color The top left has to be true because for it to be incorrect means the box under it and the bottom right box would also have to be mimics making it 4 mimics out of three