A fortress that guarded the Mithram Gap, it was a place of lava and red rocks, and named for the ‘Blood Stone’ flower. After the first Downfall of Sauron at the end of the Second Age, the Uruks took this fortress and inhabited it for many centuries until their master’s return, so the fortress was never held by the Dúnedain. It was a place of Dark Sorcery, with foundations of molten lava.

It was said that the Black Uruks were bred here, when Sauron first used them to assault Ithilien before the Great Years. It was also the first spawning-place of the Olog-hai.