Mighty Jack and the Goblin King

Fortified by eating the mysterious plants, Jack and Lilly reach the weird land to which Maddy has been taken, but become separated. While Jack works his way into the castle, Lilly is rescued/captured by goblins. When told that the Goblin King intends to wed her she challenges him to single combat, slays him, and becomes king herself. With the help of the goblins, they escape with Maddy. Burying a monster's carcass they discover Confederate gold, staving off foreclosure on Jack's home. Three months later Zita the Spacegirl appears, asking them to join her in saving the world.