We then looked to the Orog and decided that we could create a more specialized group of Orogs that gave us some of the benefits of the Neo-Orog without violating the source rules. Essentially, we just made slightly smarter and stronger Orogs. The Orog is a very good example of us looking around through source materials for a creature that could accomplish a very specific goal. In this case, something would populate a very strong militaristic camp in which one of the sub-quests could be based. In this case we didn't have a method to incorporate the Neo-Orog that we wanted to use, so we just slightly modified the Orog to create a more entertaining experience for the player while sticking within the rules of the Realms.
Half breeds are part human and part snake.
They plan elaborate traps and utilize their surroundings superbly in combat. They also hold all reptiles in high esteem. The center of yuan-ti life is the temple. When we began designing the game, we knew that we wanted a civilization of some sort to be an obstacle to the player, and we knew that we wanted a dungeon area in which volcanic activity created a semi-tropical steamy and warm environment. There are a few other things we needed too, especially a monster type that would hearken to a snake like deity.