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Here's what I came up with (or rather, I fleshed out Gilraen's idea):
1A. Refugees (Refugee Camp)
The peasants who refused to pay taxes and fight were forced to flee into the depths of the forests, not even inhabited by elves. There, they formed camps and try to defend themselves from unwanted guests.
1B. Trained Refugees (Refugee Village)
Some of the refugees stumbled upon the homes of warriors, who taught them how to wield a sword.
1C. Skilled Refugees.
Some of the peasants knew how to forge armor, and therefore they could make weapons and armor for themselves.
2A. Wind Runners (Forest Arena)
Those who danced with death and sided with Agrael were exiled. In the forests beyond Irolan, they organized their city and called themselves "Wind Runners."
2B. Sound Runners (Great Arena)
If the Wind Runners were skilled and quick with their blades, they could call themselves Sound Runners.
2C. Light Runners.
Those Wind Runners who distinguished themselves in battles became known as Light Runners. Light Runners are capable of frightening their opponents with their unexpected attack.
3A. Free Specters (Abandoned Tree)
Specters are tireless spirits, doomed to serve the Necromancer forever, but some of them broke free from their chains and flew deep into the forest, where they have lived in old, rotting trees for a long time.
3B. Ancient Specters (Rotten Tree)
Some of the specters have lived in the forests for a long time, frightening the peaceful inhabitants.
3C. Spirits of Fallen Soldiers (Rotten Tree)
After the battle, the spirits of the fallen soldiers rose from their bodies and flew deep into the forest. With their chilling touch, these spirits can drain all the mana from their opponents and use it to restore themselves.
4A. Hawk Riders (Nests in the Mountains)
High in the mountains live huge hawks. Exiled dwarves tamed these birds and began to launch devastating raids to prolong their existence.
4B. Eagle Riders (Nests on the Cliffs)
Even higher than the hawks live proud, huge eagles. It is incredibly difficult to tame them, but those dwarves who succeeded became almost invincible.
4C. Falcon Riders.
Falcons are free birds, so it is very difficult to tame them, but the bravest dwarves managed to do it!
5A. Extinguished Imps (Imp Cave)
Some of the imps went deep into the forest, where they lost all their fiery power, but gained immense strength.
5B. Extinguished Fiends (Black Cave).
Some of the fiends went deep into the forest, where they lost all their fiery power, but gained immense strength and the ability to blind or even kill the enemy with their ashes.
5C. Extinguished Demons (Black Cave)
Some of the demons went deep into the forest, where they lost all their fiery power, but gained immense strength and became almost invincible.
6A. Escaped Colossi (Thunder Lair)
Not all colossi wanted to obey the mages who summoned them, so they went deep into the forest.
6B. Escaped Giants (Storm Lair).
Not all giants wanted to obey the mages who summoned them, so they went deep into the forest.
6C. Escaped Titans (Storm Lair).
Not all titans wanted to obey the mages who summoned them, so they went deep into the forest.
7A. Exhausted Cyclops.
Some cyclops could not withstand the terrible conditions of slavery and, already almost exhausted, fled into the forest.
7B. Cyclops Slaves.
When people enslaved orcs, some of the cyclops killed the guards and fled deep into the forest.
7C. Evil Cyclops.
Cyclops who wanted to gain freedom became enraged and disappeared into the forest thickets.