Notch is a powerful wizard, but not a god, who's said to have brought many of the humans to Aetheria. He is one of the only people said to be capable of defeating Herobrine. It is hinted that he has the ability to cross between Earth and Aetheria.
Notch has a black hat and black cloth (powers unknown) and an obsidian sword.
In real life Notch is Markus Persson, the creator of Minecraft.