You gain a functional trait of an animal. When you cast the spell, choose one of the following options, the effects of which last for the duration of the spell. While the spell lasts, you can end one option as an action to gain the benefits of a different one if you have the material components for a fitting animal.
Flight. You gain a set of functional wings styled after the animal of your choice, from bat wings to eagle or bug wings, granting you a fly speed equal to your walking speed.
Climbing adaptation. You develop a prehensile tail or other extra appendages, such as a spider’s legs, which you can use for climbing or combat. While you have the extra limbs, climbing does not take extra movement speed, and you have advantage on athletics or acrobatics checks made to maintain grip or balance while climbing or walking, or to resist being tripped or knocked prone. You can also use your adaptation to attempt to trip a target as a bonus action. Make opposed athletics checks. If successful, the target is knocked prone.
Adapted speed. Your legs grow thick and powerful, you develop hooves or extra legs, or otherwise adapt your body for moving quickly. Your movement speed increases by ten feet, and you may take the dash action as a bonus action on your turn. While in this adaptation, attacks of opportunity against you have disadvantage.
Animal senses. You grow dog or cat ears, your eyes gain focus, your nose becomes a sensitive snout, and you otherwise adapt to better observe your surroundings. While in this adaptation, you gain darkvision with a range of 60 feet. You have advantage on Perception and Investigation checks that rely on your physical senses, and your passive perception increases by 5 while in this adaptation.