UltiSlayer: A being of origins unknown, he first appeared after a large storm spat out several multicolored lights in several directions, and shot 2 green ones towards the ground. And from the crater that had been created due to the impact of the lights, there was UltiSlayer.
He is capable of creating different green energy blasts, constructs, and is also capable of flight.
And the picture shown above, is his first form. Also known as the form he took when he first appeared.