After King Leopold locks Queen Regina away in her chambers, her father visits the Genie of Agrabah with a box containing Agrabahn Vipers and a key to open it. Without revealing what's inside, he asks the genie to take the box to Regina, explaining it's the only thing that will give her freedom. The genie does as Henry asks and delivers the box to Regina. She unlocks it with the skeleton key and reveals two Agrabahn Vipers inside before manipulating him into agreeing to kill King Leopold with the vipers. When he visits the king's chamber that night, he unlocks the box with the skeleton key and releases the snakes. They climb into the king's bed and bite him in the neck, killing him shortly after. ("Fruit of the Poisonous Tree")