Diverse Lineage
From D&D Wiki
Your bloodline is does not consist of a single subrace, as such, you are able to gain some ability from other sub races. When you choose this feat, choose one subrace that your race has access to.
- Choose one ability score bonus from this subrace. That ability score increases by one for you
- Choose one feature that this subrace gains, you can now use it as if your were this subrace
You can take this a feature a number of times equal to the amount of subraces your race has.
Example: A Mountain Dwarf takes Diverse Lineage at 4th level, he chooses hill dwarf. His wisdom increases by one, and he gains the "Dwarven Toughness" feature.