Guardian of the Wild

Your mystic connection with the wilderness enhances your ability to react to threats.

Prerequisite: Attuned to the Wild, elf.

Benefit: When you are in a terrain type you have selected the Attuned to the Wild feat for, you gain a +2 dodge bonus to Armor Class. If you are in an area that qualifies as more than one kind of terrain, these bonuses do not stack; you receive the bonus for only one of the terrain types.

Source: Advanced Race Guide