Prehensile Tail

You must already have a tail to gain this feat, or one must be given to you through magical means.

Your tail is almost a third arm and hand for you. As a bonus action, you may perform one of the following actions with your tail.

• Draw or stow an object weighing up to (5 + your strength score {Max of 35}) pounds with your tail. If doing this while stealing, you gain advantage on your Sleight of Hand check.
• Open and close doors.
• Use thieves tools.
• Wield a dagger and make a single attack with no modifiers.
• Gain advantage on Grapple checks involving keeping one grappled. The initial Grapple check does not gain advantage.
• Give the Help action to a friendly creature within 5ft.
• Hang from a piece of scenery, such as a chandelier, scaffolding, a lamp post or a torch sconce.

Your tail may be sharp on the end, in which case you do not require a dagger to make a dagger attack with it, however it gains no positive or negative modifiers.

Your tail can extend and retract from it's normal length, up to a maximum of 10 extra feet away from you (making your range with it 15 feet). You can retract it almost completely into you, leaving only a slight cut-like mark on your back where it can extend from. It seems to magically shrink or grow on demand, with no place for it to seemingly be retracting into. You also have full control and range of movement over your tail, unlike most creatures. Like breathing however, you can also choose not to control it, letting it act like a normal tail.