takes place before the season 5 finale

Each of them visited Princess Twilight Sparkle for their own reasons, one doing so uninvited. But when a challenge is made and magic accidents occur, these three strangers will need to become friends with each other as well as make new friends in the strange world they've come to if they want to make it back alive.

Will they make it back safely?

Will they survive the dangers of Everglow?

Will Everglow survive them?

At least the last one is very likely.

This is a story taking place mostly in the Ponyfinder setting of Pathfinder.
Pathfinder is a table top rpg, very much in the same vein as Dungeons and Dragons. There is even a Ponyfinder made for 5th edition of D&D if you're interested.
Ponyfinder itself belongs to David Silver, who is also an extremely active writer on here, and has written several stories in the Ponyfinder setting himself. For sanity's sake, this is in a different Canon.

I am slightly disappointed that there is no tag for Moondancer.

Cover art by Luxury Yacht