Sorcery I. What is a sorcerer without knowledge?
I'll tell you. Nothing. Aether Crystal - Items - Aion. Noble Dark Dragon's Tome - Aion recipe material calculator. Domain Driven Design is the thing most of us (developers) stumble upon at some point of their career.
There is quite number of books and posts about this topic and a couple of big communities. Developers starting exploring DDD work (probably from Eric Evan “Blue Book”) and many of them became convinced how good this DDD thing is. The Definitive Q&A FAQ - AionSource.com. Aion™ Online: The Official Aion Fantasy MMORPG Website.