Mystic Cave

AJ found a big Cave nearby the way from the Farm to Ponyville. Everything the she saw was a slightly blue light the comes out of it. Curious of what it could be down there she binds a rope on a rock and pulls herself down. She couldn't believe what she found down there

This Picture took me a really long time idk how long exactly but i would guess so 10h maybe more
Also i put a little easter egg in it maybe you can find it