I said I would clarify Nitsua's origin so here it is...

Chaos is a part of life it is needed without it the world would be dumbfounded. Nitsua is a thing...Living..maybe unsure is if it cares all it knows is its freedom, power and hunger. Its purpose is to end all. Everything ...must be devoured. It is the form of Armageddon itself, the undertaker of all, the death bringer, the last thing that will live. It began its life at the brink of creation. It was the first thing after the rest and all else was made. It's purpose to erase the created before it, once this is done it will wait for the next creation to eat. Nitsua was however discovered by a Chaos mage who realized, fearing his death; must restrain the creature. So the mage did leaving a curse of upon his death Nitsua would be passed to his blood relative. This worked and kept Nitsua from it's purpose. However when Austin insulted the previous host she manipulated the curse forever binding the creature permanently to the Pirate this also solved the problem when the pirate dies so will Nitsua....