The ultimate form or, forms if you may within Hiro's arsenal. Deva Caste is more of a technique rather than transformation. In this form, instead of simply using one form, Hiro combines other forms and different clouds to get different effects. He was first pushed into using this form by Aeolus during their first fight, however still loosing with this form, he trained this to the limit in order to defeat him. Deva Caste is the combined power of all three castes into one, boosting all of Hiro's properties exponentially, though along with all the strengths, it has all of the weaknesses as well.