The Master Wizards all told you, don’t mess with Baba Yaga. But of course you wouldn’t listen, she is only one witch, what could she possibly do to you. And now you find yourself in the Wilderness, a few days missing from your memory and horribly disfigured, with parts of your body shrunken and grown completely out of proportion. And not in a way that you’d find advantageous. Your only way back to full humanoidity goes through Baba Yaga.