Crimson Dawn

Loot from Teth Se-Nehi, one of the fanatic cult members in the group battle in Reliquary in Temple of Cyric.

In-game description
"Legend tells that this elegant blade appeared at the moment the sun rose over the eastern horizon. As the dawn's rosy light flooded the forest, the blade shimmered into being atop a flat stone. Local foresters, even warriors, were afraid to touch the weapon lest it was cursed. Finally, a brave old man who had been a fighter in his youth grasped the hilt and claimed the blade as its own. Terrifying beasts sprang at him a moment later, creatures of red mist and fangs and claws. The old man clung to his courage and lay about him with the sword. He grew faster with every monster he killed until finally the clearing was empty. The old man was feasted in the village for days and then set off to live his final years seeking adventure on the road."