Friendship? Waste of time.
Card games? Waste of paper.
This was the opinion of one Twilight Sparkle, personal student of Princess Celestia. Or at least it was, until said Princess decided to send that humbug to Ponyville to oversee the Summer Sun Celebration. Now she has to deal with pink ponies that won't stop talking, dueling Pegasi, and nighttime eternal if she can't finish this on time.

A blend of two AUs. The one is Yu-Gi-Oh in Equestia. The other is a "What if" alternate timeline that kind of snuck into the writing process, so I apologize if that's a turn-off for you.