“I think I would like to be a dryad, one with the ability to protect the forest I’m in,” you say.
“I can absolutely arrange that for you,” replied the genie.
She snapped her fingers and you found yourself in a dense jungle, possibly the Amazon. She snapped her fingers again and you found yourself naked. It was worrying, as you could see a lot of insects flying around that might be interested in a human. But you didn’t need to worry about that much longer as she snapped her fingers a third time and you felt a tingling in your toes.
You looked down and realized that they had already started to turn brown and were extending into the ground, with other roots forming from other parts of your feet. You were forced to raise your arms as your fingers began to extend into branches and your skin began to turn the dark brown of a healthy tree while your torso stretched out.
Your arms twisted around your head and you grew taller and taller, and your roots grew deeper and deeper. The most disconcerting part is how hungry you started to feel, even as your organs dissolved away into the wood and sap inside a tree, but that hunger was alleviated when you broke through the canopy and began to feed from the sunlight as your branches sprouted leaves that began to photosynthesize. You were now a truly massive tree, but only half of your wish was complete, as you felt an empty space within yourself begin to grow you a body you could use to move around and protect your new home.