1- Central Redan
The largest of the isles, Central Redan is primarily forests and grassland. However, there are mountains, tundras, deserts, and even a massive swamp. The largest population of Riders lives here. The two largest settlements are Gynycon (1) in the Northern Steppes, Silverridge (2) in the Silvergale Mountains, Inteca (3 in the Junidan Rain Forest, Milasai (5) in the Southern Plains, Oasys (6) and Azo (7) in the Bara Magna Desert; very few Riders live near the Boglands, though there are stories of bandits living and hiding in the unforgiving swamps.
2- Western Redan
A harsh, volcanic island with an active volcano, Western Revan only has a single settlement, known as Geo-Harth (4). Though the western side of the island is quite fertile, most of the residents of Western Redan are miners.
3- Eastern Redan
Though the island itself is largely uninhabited by Riders, the floating village of New Tanzia (8) sustains itself through fishing and trading with the other cities. Eastern Redan is primarily composed of woodland and wetland, and is home to a variety of species, including Leviathans.
4- Harsheon
Uniquely among the Omna Isles, the currents of Harsheon well up from a nearby trench, bringing an abundance of deceased sea life to the western side of the island, known simply as the Boneyard. Many monsters here are adapted to scavenging for survival, and will attack nearly anything that intrudes on their territory. Situated in the center of the island is Frebo (9), a unique village whose people specialize in searching for old relics and hunting, taming, and training aquatic monsters.
5- Belga Isle
A small island in the south, very few Riders make their home on Belga. However, it is home to many Lynians, including Grimalkyne, Felynes and Melynx, and Gajalaka. Though similar in climate to other parts of the Omna Isles, it is home to many dangerous monsters.
6- Elion
The easternmost of the isles, Elion is often ravaged by powerful storms. Because of this, few Riders live here, and those that do must be tough to survive both the storms and the monsters that live here.
7- Misty Nest
The southernmost of the Omna Isles, the Misty Nest has seldom been explored on account of being home to many rare and powerful monsters, as well as the island perpetually being shrouded in fog. Though unconfirmed, rumors abound that the Nest is home at least part of the year to Elder Dragons.
8- The Northern Isles
Largely uninhabited save some small outposts managed by, the Northern Isles are filled with many ruins and artifacts from an ancient civilization.
9- The Ancients' Tower
Surrounded by a near-impenetrable storm, very few have ever made it to the Ancients' Tower. Reports state that the massive structure is home to a variety of monsters, including Elder Dragons.