We know that when the players do the WOW

We know that when the players do the WOW leveling during the adventure, they have something special as their pursuit. As for the spell occupations, it is the dream to get Illustration of the Dragon Soul by all means, which is an accessory that falls in Obsidian Dragonshrine. That is to say, what they do is to get it world of warcraft gold.
In the WOW 3.2 version, the players farm the Obsidian Dragonshrine of 25-player mode every week with the purpose of trying to get Illustration of the Dragon Soul. However, the falling rate is quite low. It will not drop most of the time. Even if it drops, the teammates have to compare the requirement point to decide who will be the owner.
Why do these spell occupations are eager to gain Illustration of the Dragon Soul? First, this accessory is a superb item for them. Secondly, there are no many good accessories. In fact, the players can use the higher-level brand accessories, such as Resurgence Amulet. However, these things are even not as good as the low-level accessories that drop from the heroic instance.
To be honest, it is designed by the Blizzard. For the falling of the accessories, they adopt the old mechanism since the release of WOW Molten Core. It seems to it is a memory. In the huge falling list, several accessories are extremely difficult to fall. Though the situation is much better than in the past, the accessory is still difficult to obtain. Besides, the competition is also intense. That is to say, the Blizzard has noticed the problem, and they may do some changes in the future.
The WOW designers state that they may also increase the number of accessory. But it does not mean they will become worthless. The current spell occupation can only choose two accessories in Ulduar and one of them is in the heroic mode. As a result, the competition is still very fierce. If there are more accessories, then the teammates will have more chances of getting them, so that the players can have their own different accessory, and they will not have to compete with each other for gaining one.