The Giant's Coffin was a geographical landmark on the death world of Miral. It was a huge mesa of rock which rose out of the equatorial jungle, providing a formidable natural fortress - steep walls slowed down attackers, while clefts in the rock provided excellent firing positions for defenders to cover the approaches for miles in all directions. The Scythes of the Emperor Space Marine Chapter maintained an outpost on the mesa for resupplying and recruitment.[2a]
In 990.M41, Chapter Master Thorcyra led the Scythes of the Emperor in a bold last stand upon the Giant's Coffin, after the destruction of their home world of Sotha. Only around a hundred Space Marines escaped aboard a flight of Thunderhawks, and Thorcyra himself was killed after passing the mantle of command to Captain Thrasius.
According to local Mirali myth, the Coffin was the burial place for an ancient race that came from the stars.[2b]