|Map||Basic Data||Planetary Image|
|Class:||Adeptus Astartes Homeworld|
|Tithe Grade:||Adeptus Non|
Medusa is a harsh realm of perpetual gloom, located extremely close to the Eye of Terror. With a dark and polluted sky, Medusa's sun rarely shines on the planet's surface and the world's geology is highly unstable, with earthquakes and volcanic eruptions constantly creating and destroying mountain ranges and seas. The people of Medusa are hardy and flourish despite the hostile environment. The population is broken up into clans who viciously compete and vie for natural resources and safe ground, as the unpredictable nature of Medusa's landscape means little can built in one place for long, save a few areas of relative calm which are mostly reserved for the Iron Hands Chapter. As the nomadic clans seek a new settlement, great caterpillar-like mining haulers carry their personal possessions and resources. One of the greatest wonders of Medusa is the ruins of the Telstarax, a colossal planet-circling space station dating back to the Dark Age of Technology. It is believed that the Telstarax was used to plunder Medusa of its resources.
During the 13th Black Crusade of Abaddon the Despoiler, Medusa would come under massive invasion from Chaos forces. The ensuing clash saw the largest tank battle in the Imperium since the Horus Heresy.
Sometime after the formation of the Great Rift, Chaos Space Marine forces from the Death Guard, Cleaved, and Purge raided Medusa. Though the Iron Hands drove off the attack, the damage was great and parts of Medusa have since been quarantined due to infection.
- Felgarrthi Mountains is a great mountain range that rose high over the basin of the plain. It consists of ten big countenances, each hundreds of metres in height, towering from the stormblasted summit.[5c]
- Karaashi, the great Ice Pinnacle where Ferrus Manus originally crashed onto Medusa, is still present to this day. However it is said to be half the size it once was.
- Oraanus Rocks - a mountain ridge that extended for several hundred kilometers (north to south of the planet) and consists of ultra-hard lumps of diorite - a metamorphic crystal peculiar only to Medusa planet. It is a place of the Trial of Rocks - a test for Neophytes of the Iron Hands.[5a]
- Mountain Yarrk - resembles something between a giant leopard and primate, several meters tall and with a broad shoulders. Its long arms and powerful body covered with black shaggy hair and its head had a mane. Yarrks is very fierce beasts and frequently used by the young Medusan clanmen to compete with for the attention of the Iron Hands recruiting new neophytes.[5d]
- Oryx - beast with antlers.[5d]
- 1: Index Astartes IV, pgs. 47-48
- 2: The 13th Black Crusade (Background Book), pg. 73
- 3: The Horus Heresy Book Two - Massacre, pg. 70
- 4: Codex: Death Guard (8th Edition), pg .22
- 5: The Eye of Medusa (Novel) by David Guymer