One ability score of your choice increases by 2, and a second ability score of your choice increase by 1.

You have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You can innately cast detect thoughts requiring no material components. Your spellcasting ability for this trait is Intelligence. A target's Wisdom saving throw DC is 8 + your proficiency bonus + your Intelligence modifier.  When cast by you using this trait, the target is unaware that you are reading its surface thoughts, but becomes aware if you probe deeper into its mind. 

As an Action, you can polymorph into any Small or Medium humanoid you have seen or back into your true form. Your statistics, other than your size, don't change. Any equipment you're wearing or carrying isn't transformed. You revert back to your true form if you die, but not when you're reduced to 0 hit points or unconscious. 

Your size is fluid, depending on your form. You are either Small or Medium.

Your base walking speed is 30 feet, even when you are polymorphed into a Small form.

You can speak, read, and write Common, and one extra language of your choice. The second language is typically an additional language spoken by the humanoid race you present as at the beginning of the campaign. For instance if you appear to be a Half-Elf, you would speak Elven.