This is really minor, but kind of funny. When doing the “Help Admiral Clarinda Demard” heart in Sparkfly Fen, you can go underwater while in the pink moa form she puts you in. You don’t really animate and you lose all your skills, including the skill to transform back into your regular self. If you get out of the water, you can change back. Considering you lose the skill to change you back, I figured this might not be intended. I had checked this against tonics and saw you at least keep your ability to transform back when you go underwater when using those.
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