The founding myth of Odrysa (in no way associated with the non-existent peoples of Oenotra)
The story revolves around two brothers, Odry and Teres, joint leaders of the Moesi, people who had been forced from their danubian homelands by more powerful Thracian tribes. Odry had a vision, in which Karaz (the god of health and healing) instructed him to found a new town, on a small hill on the coast of the black sea. Traditionally, severed human heads were needed to consecrate the ground on which new settlements would be built. So Odry and Teres set out with their to battle with the rival Thracian peoples
The brothers were victorious, and each returned with a severed head of a Thracian warrior. Both had fought so valiantly and honourably that they were greatly blessed by both Arenes (the goddess of battle) and Chalskon (god of virtue, husband of Arenes and father of the other gods). This made the goddess Mevyra (goddess of the hunt, mistress of wild beasts, also known as the night goddess) extremely jealous.
The brothers gathered their families and headed to the future site of Odrysa. But the night before the consecration ceremony, while the brothers were sleeping, Mevyra made serpents grow from the eye sockets of the severed Thracian heads, which then slowly slithered away into the night
The next day, the brothers noticed they were lacking in the necessary items to proceed. Rather than give up, Odry bravely offered his own head to the high priest, so that the consecration could go ahead. For this noble sacrifice, Chalskon made Odry into one of the Herarcs the gods who had ascended from amongst the most noble of earthly, mortal men. Odry thus became the patron god and protector of Odrysa, the town that was named after him. A primitive temple to Odry was built in the heart of the town, said to be on the exact site where his head was originally buried in the ground.
Teres, meanwhile, was heartbroken by the loss of his brother, and set out to get revenge on the goddess Mevyra. The various intrigues and misadventures between Teres and Mevyra make up most of the Odrysian mythology - their many stories served as moral examples for the Odrysians. Teress life ended in tragedy and redemption, before finally being elevated to the status of godhood himself.
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The Odrysians believed in two main principles the first and foremost being the accumulation of blessings from Chalskon, by doing noble deeds and aiding others (harming others without justification would result in Chalskons blessings being removed or even a divine curse). Intelligence, eloquence, and all kinds of artistic talents were considered signs of Chalskons blessings.
The second was the accumulation of blessings from Arenes, through daring and bravery in battle. Similarly, cowardice would result in being cursed by Arenes. Though women would rarely take any part in war, mothers who raised their sons into great warriors could also receive Areness blessings. Physical strength, health, beauty and virility were considered signs of Areness blessings.
Bands of Odrysian warriors would conduct the rite of blood brotherhood, the objective being a kind of spiritual union recognised by Arenes, through which each would share in the blessings or curses of the others.