Living Fortress (Teamwork)Source Inner Sea Races pg. 207
Stubborn, tenacious, and proud, you’re all but immovable when you have kin to back you up.
Prerequisites: Dwarf, hardy racial trait.
Benefit: Whenever you fight defensively and you’re adjacent to an ally who also has this feat, your racial bonus on saving throws against spells and spell-like abilities increases by 2.