Helstrife

Hel arose from a terrible nightmare. Images of endless ranks of demons laying waste to the land, clawing their way out of holes in the city streets, could still be seen clearly in his mind. The vivid imagery of being torn to shreds by the horde was the last he remembered. 

A machine of unknown origin had been attached to Hel during him sleep. A circular engine of some sort, with sturdy wires grafted up into his upper arms. Before his mind could even process that his body had been augmented, an earthquake could be felt, violently thrashing his dwelling's foundation. The device on his back whirred to life.

The earthquake... He remembered. In a rush of adrenaline, he sprinted from his home all the way to the river's edge. Across the bridge he saw a mirror copy of his awful nightmare. The unknown, terrifying horde, marching in an army towards the mainland.
Were his visions of a doomed future? He felt a surging in his palms. The Rollback Device, the source of this power, told him otherwise. He was chosen. Chosen to prevent the nightmare from ever becoming a reality.