Lion King's Castle
Lion King's Castle, commonly referred to as Lionheart Castle is an El Nath expansion released in the Aftershock Update in GMS. The Castle is the home of Von Leon, a gruff man who had sold his soul to the Black Mage in order to combat against the Cygnus Knights for the murder of his wife, Ifnia. To reach Lion King's Castle, you must take the left route at the Sharp Cliff 4.
Lion King's Castle is special in the way that it is the first area to implement the Party Play bonus, in which an additional 50% experience is granted per party member. A full party of 6 in the maps would bring you and your teammates a total of 250% experience bonus, making your exp gain rate to skyrocket and promote faster leveling.