The Wolf of Ash and Fire

The Emperor was fighting his way through a howling mob of the largest greenskins Horus had ever seen. Most were the equal of a primarch in stature. One even dwarfed the Emperor himself. His father fought to reach a fragmenting ring of iron surrounding the blinding plasma core, but the greenskins had him surrounded.
This was a fight not even the Emperor could win alone.
But he was not alone.