Ragnorak Grey

Ragnorak Grey was a horrible creature and the main antagonist of the New World Sentinels arc in the Story of the Sentinels.

Origin
Ragnorak Grey or as he was called in his ultimate form Avatar Grey was the darkness forged in Mirages heart. It grew and festered with the power of the Dream Dream Fruit and eventualy became a sub sentient being. It posesses Mirage and began corrupting others. It fed off of their hate and began to grow. It evolved into a craeture called Eraser when it finaly could leave Mirages body, but that body was incomplete and was defeated by the Earliest Sentinels. It escaped and began it's plot for world domination.

Forms
Eraser was just it's first form. After it's initial defeat it conquered other lands creating a region of the New World known as the Darklands. He evolved there into Night walker, who was completely destroyed by the Sentinels during the beginning of the Five Year War. But by sacrificing his right hand minion, he regenerated into a new creature.

his second form was called nightmare and it could manipulate peoples thoughs and corrupt them with poisonous miasma. In the end it realized it's weakness while fighting the early sentinels during the war. It burnt it's own body and absobed the corrupted souls of it's minions and evolved further into a being of pure energy. Then it took on the name Ragnorak Grey. This was it's ultimate form for almost the whole later half of the war until it learned it could assimilat ehte powers of those it devoured and fought. It evolved further into Avater Grey in an atempt to take over Zero while he was in his X-Limit state. It was here that Mirage found an opening and released his most piowerful attack nearly killing him, but Volt, Mire, Berugu, and Zero all aided and together the banished Avatar Grey.

Impact
Ragnorak Grey had a horrifying impact on the world, by the end of the Five Year war it had badly corrupted a large amount of area and had killed nearly 30,000,000 people. It alone is responsible for the beginning and the aftermath of the Five Year War, and much of it's battle scarred domain remains in that state today. Though much was eventualy claimed by Whitebeard and nurtured back to tranquility. Nearly 100 years later, his spawn Fafnir Grey was released at Mirages death. He wreaked havoc through the grand line for about a year before the 13 Sentinels stopped him. Butr his was not before Ragnorak Grey was revived in a new body. both were inevitabley destroyed forever, never to return. Ragnorak purified by Aethers X-Limit, and Fafnir lost within the confinds of his own mind and soul due to Oversouls X-Limit