Naruto - Amaterasu

Amaterasu : Also known as the Goddess of the son. Amaterasu is the strongest Physical doujutsu made. Amaterasu  is a black flame that is said to burn for 7 days and nights or will not stop burning untill the thing that it’s burn it burnt to complete dust. The black flame cannot be distinquished by water or any other liquid Element. the only other way to stop Amaterasu is too seal it away or else you have to wait the 7 days. The Black flame is hotter then Fire itself. But the Technique is Dangerous and causes Severe damage to the eyes to the point that the users eyes become bloodshot.