On this episode of Adventure Time with Fionna and Cake...

Marshall Lee informed Cake the Cat of a magical treasure hid in an ancient cave. Knowing Fionna loved questing Cake told her of the treasure and they were off. After dozens of challenges and obstacles Fionna and Cake had reached the treasured orb glowing upon a pedestal. Fionna lifted the orb from its resting place and began to feel a strange surge inside herself. Her belly began to grow large in fertility as the magical orb did its work. Shocked, Fionna screamed at Cake demanding to know who told her of the Treasure. Marshall Lee would go on to say it was his best prank ever.