Currency: The ancient dragons which built the Council of Kings also created a single currency to unite the various realms. Over time the currency fell into disuse as pride took hold. Now each realm has their own coinage or bartering system with the council forever deadlocked on how one compares to the others.
TRADE: Surprisingly most of the realms embark on some form of trade with the others. Several trade houses arose over the centuries with each one engaging in piracy against the rest. For a house to be caught engaging in such activities would lead to the ruination of their house by the government of which ever realm the house resides in.
To keep the trade routes safe the Council of Kings developed a naval force in which each realm must contribute. The mammoth fleets patrolling the routes are based on giant floating fortresses that dwarf the largest of ships.
Slavery is admitted and slaves are most frequently acquired through the sacking of minor settlements or successful pirate attacks against a merchant ship.
TECHNOLOGY (Part One): Only the Duervken are proficient in the use of gunpowder which they use only to mine the precious metal ore used to create weapons and armor. Guns and cannons are not used except in the most dire of circumstances due to the Duervken’s love of close battle.
The Humans use steam powered by rare flame stones to power their cities. Light stones are used in place of electricity to light the city streets and houses. Relics remain of guns but so far the Duervken have refused all offers of sharing that technology with them.
The fair skinned Felerions are renowned metallurgists and are known to cloak their cities in crashing seas that only react to their commands. The other races are envious of this but so far haven’t deciphered how it is accomplished. In truth they have giant fans beneath the waves that churn the water. Ancient in design and construction not even the Felerions are sure exactly how it works.