From DDO Compendium
As characters earn experience points by questing, they also earn Action Points. For each Heroic Level (1-20) a character will earn 4 Action Points. These Action Points can be spent on enhancements that make your character stronger.
These points are spent in Enhancement Trees. Each character gets the ability to use trees that are associated with both the classes that the character currently has taken levels in, and one for the race that they are. At any one time you can spend points in up to 6 class trees, and the 1 racial tree.
Pages in category "Enhancement Trees"
The following 89 pages are in this category, out of 89 total.