Prehensile Tail

Your particular tielfling heritage has allowed you to develop a prehensile tail. Your tail is muscular and very long, about your body length, and can support your weight if you aren't encumbered (e.g. while hanging from a branch). Your tail has a patch of bare rough skin called a friction pad that helps in grasping objects. You gain the following benefits:

• You have advantage on Strength (Athletics) made to climb.
• You have advantage on Dexterity (Sleight of Hands) checks.

While the tail is used primarily to assist in climbing and keeping the hands free for foraging and carrying, you can use it to do the following simple tasks: lift, drop, hold, push, or pull an object or a creature up to 50 pounds; open or close a door or a container; grapple a Small creature or smaller, or make an unarmed strike dealing normal damage (it doesn't give you an additional attack). Your DM might allow other simple tasks to be added to that list of options. 

Your tail can’t wield weapons or shields or do anything that requires manual precision, such as using tools or magic items or performing the somatic components of a spell.