You can fly at a speed equal to your movement speed

You can move your tail at will and use it to perform small tasks like grabbing an object or performing a small attack. However it cannot do anything that requires fine motor skills.

Due to your infernal nature you have resistance to fire and vulnerability to radiant.

You're able to change your height and appearance at will even make yourself look like a different race. However when traits like your wings or tail are hidden you cannot use them.

Your gain and extra two points to charisma and one to dexterity

you are both a fiend and humanoid