Sophos

In the scorching wild west a bounty hunter suddenly awakens to an ethereal voice calling his name in the center of a ruined mausoleum. His recollection of events are hazy, but he notices piles of corpses laid around him. When he makes his leave he is greeted by a large purple lake that consumes the sky with entities swimming in it. Who is he? What led him to this place? What is inside the purple lake?