Only the top of the mountains denied him access. After hundreds of battles and wars, there was just one inaccessable mansion, one which Mortarion knew well,the one where his adoptive father resided. Mortarion returned to his village, confident in the knowledge that he would return for his final battle. When he returned, there was word of an amazing visitor who brought promises of salvation. The mood of the primarch darkened. His final battle had been building for years and he was not happy that someone else would share his glory.

People say that Mortarion flattened the wooden door to the banquet room and he found the elders and a stranger who was their opposite in every way. Where they were gaunt and pale skinned, the stranger had bronzed flesh and a perfect physique. The connection between father and son immediatly formed and was plain to see, although Mortarion knew nothing of the link. The stranger challenged the young primarch to capture the last mansion alone, but if he failed he would join the stranger in total obedience. Mortarion turned away and began the ascent to the final mansion, that of the man he had called father, alone. He marched to the top with the anger given by years of building hatred for the final warlord. He climbed higher than he had ever gone before, ignoring the increasing toxins.

When the confrontation came, it was mercifully short. Even the hoses of his suit began to corrode and rot down and Mortarion was gasping for breath. The last thing he saw was the overlord walking towards him to fulfill the promise he had made years before. Then, the stranger stepped between them and, defying the fog, killed the warlord with one mighty sweep of his sword.