She may not be a foal but Sunset Shimmer did have some pretty shady behavior when she first appeared, including fraud. The card's info says: Foal Fraud Normal Trap Activate only when you control only "My Little Pony Gabby Gums", "My Little Pony Diamond Tiara" and "My Little Pony Silver Spoon". Return all other monsters on the field to the owner's hands. Common
