King Sombra's door - Fluttershy's greatest fear

1080p format

I didn't know what to do, so I said: "Hey, let's draw some Fluttershy!": and then this came up

Sombra's door makes you face your greatest fears... so what if Fluttershy experienced something like this? Her greatest fear...

Hope you'll be
sad and sick /
Here's no place
for the weak ← just in case, if it's unreadable in the image.