The Top Potion and Bottom Potion require the following conditions to be met:
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Obtain the recipe from either the 7th floor main quest or a 7th floor exploration event (the locations differ).
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Discover a clue about the old man's relocation through an 8th floor exploration.
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Find the relocated old man on the 7th floor.
After fulfilling these steps, you can register the recipe and craft the potion using the required materials.