Fan Casting The Gatekeeper

At the edge of time there was a corrupted reality on the verge of annihilation but luckily Time itself created a pocket dimension to preserve existence that once reality fell was corrupted and created a ripple effect making it to where Time had to start everything over and used the remains of the fallen corrupted universe to build a new one over the darkness, but this time he made it to where any action, decision, or step anyone or anything took or made would create an entirely separate reality so that when one universe fell there would be another to take its place. Time eventually creates a being of eternal life called a Gatekeeper to watch over the multiverse but not change it but after centuries of watching he decided to create a seed that would create a portal when thrown so that he could visit the universes. Time eventually found out and broke the Gatekeeper's heart into six pieces aka the elemental heart shards. The heart shards included fire, water, life, electricity, earth, and darkness. Centuries later a man named Will Hunter aka the world's first Portal Racer was confronted once again with the choice of darkness like when he was a child and now this time with the corruption of man in his system, he took the dark heart shard and became the Gatekeeper of Darkness and named himself the Darkest. In the post credits scene, we see a man sharpening a blade made completely out of light.