In Hrondir's Tomb is a short story by Mark Clapham. It was originally published in Hammer and Bolter 20, and re-published online in August 2015.
A group of Imperial forces, including an Inquisitor and a squad of Space Wolves, becomes trapped in the tomb of a long dead warrior by heavy enemy shelling. When torn-apart bodies start to appear, the accusations fly - who or what is responsible for the deaths? Has one of the Guardsmen become corrupted by Chaos? Has one of the Space Wolves gone feral? Or is the true identity of the murderer stranger yet?