War forged's beginning

The back story to a D&D character I one had. A warforged is completely made of stone. They are massive humanoid beings that were meant for war. After the war was over they had no purpose. They were left to find they're own purpose. We join this character after he's gone through extreme heart ache. He has willfully secluded himself underground. Wondering endless. Until one day he met a creature that would force him to leave his home.