3 panel comic featuring Myrrh. Panel 1: Myrrh is in a dark room, staring at a potion on a shelf. The potion is labelled 'Potion what gives you a huge cock'. 'Hmm...' she says thoughtfully. Panel 2: Myrrh turns to another potion, this one labeled 'Potion what gives you a small cock'. 'HMMMM...' she repeats emphatically narrowing her eyes at the potion and smiling mischievously. Panel 3: Myrrh has drunk the potion, and pulls down her pants to admire her cute new dick. She chuckles happily as she stares at herself.
3 panel comic featuring Myrrh, back in the potion shop again. Panel 1: Myrrh has been shrunk down to about five inches tall, and is staring at a bottle labeled 'Potion what gives you a small CAT', rather than 'Potion what gives you a small cock'. 'I gotta stop only reading 92.6% of all information that is presented to me,' she mutters. Panel 2: Myrrh is suddenly grabbed by someone, her tiny body fitting easily in their hand. She stares up at them with a nervous, guilty smile. Panel 3: Myrrh is naked and hugging someone's dick, which is bigger than her entire body. She's rubbing herself against the stranger's cock, effectively jerking them off with her entire body.

Breaking into the apothecary at 3 AM and just drinking whatever

She's a big fan of potions. Also I've decided she has small cock energy (positive)