 
Ultimate Sage Mode is the final version of Sage Mode. It is much like Super Saiyan 4. It has almost infinite amounts of power. It is equal to the power of SSJ4 Goku. You must obtain this form by getting the opposite element of your element. It can easily destroy a Susanno'o. This form has only been achieved at Mount Myoboku and by Naruto (Future Hokage)