It's the biggest things that are sometimes the easiest to miss. I know I forgot to give Fluttershy a wing (she had the other) during the artist training grounds at one point.

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Day 136:

Flipped the (digital) MM to a random page, drew a quick roper. Looking at the entry they are way stronger than I thought they were, I'm glad I never had to fight one.
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Time: 20 minutes
Music: Pony