The Ichorian Gate is the primary defence structure of the Canyon of the Three Gates and, as such, the primary defence of Osrakum. It is called the Ichorian Gate in Quya, but the Blood Gate in Vulgate and is also called the Red Gate in both languages. Indeed, the fortifications themselves as well as the systems that extend out in front of them and which climb up the Canyon walls on either side have all been rendered in the colour of blood.

As a defensive system, the Ichorian Gate is exceedingly sophisticated. The Cloaca branches around the main superstructure so that it forms a kind of island in the Canyon floor. Two bridges lead to the 'killing field' which spreads in front of the gates themselves. Any army having made it this far would be caught in a crossfire from not only the towers flankings the main gate, but from the watchtower rising in its rear and the flanking galleries cut into the Canyon walls.

The actual gates are, by far, the most massive in the Three Lands and there are two sets of them forming another 'airlock'. It is here that are found the elaborate cleansing chambers which are provided for the Masters so that they are not forced to endure the quarantine which the Wise insist on.

Beyond the Ichorian Gate lie the Red Caves in which the 'dragons' of the Red Ichorians are stabled and where their main barracks are located.