Blizzard has released a rather detailed look into a new feature coming in Cataclysm that we first heard about at BlizzCon 2009 -- the mastery system. The system will "allow players to become better at what makes their chosen talent tree cool or unique." Mastery bonuses are passive and are tied to each talent tree for every class. The more talent points you put in the tree, the more your mastery for that tree will increase. Each talent tree will have three mastery bonuses:
- Bonus 1: Increase to damage, healing, or survivability
- Bonus 2: Increase to a stat that's relevant to the given talent tree
- Bonus 3: A completely unique effect to the given talent tree
The entire announcement from Blizzard after the break. This includes some examples of the mastery bonuses for a few talent trees.