Era beginning/end
Jealousy emerges among the Prime elements as each watches the creations of the other grow and prosper in the world they have created. this jealousy eventually leads to the Primordial war.
In the course of the war the Primordials tore rifts into the void. The chaos from which everything was spawned returned tainting and twisting the creations of the Prime elements. The Prime elements expend all of their energy in the battle against one another. As their blood flowed over the world, it began to change the creations again bringing even more variety. Where the blood of two or more Primes met their forces clashed again tearing reality and splitting the planes apart from one another.