Jahy-sama wa Kujikenai! (Dub)

The great Jahy will not be defeated! Simultaneously combating starvation, the lack of A/C, and the unavoidable weakness of turning child-sized, Jahy—previously the second strongest being in the Dark Realm—is under great stress. If it werent for the destruction of the mana crystal which used to power the Dark Realm, Jahy would still be living a life of power and luxury.