Tandem Evasion (Combat, Teamwork)Source Dragonslayer's Handbook pg. 21 (Amazon)
You and your allies help each other evade deadly attacks.
Prerequisites: Dex 13, Dodge.
Benefit: When adjacent to an ally who also has this feat,
you gain evasion against a dragon’s breath weapon and
tail sweep special attacks. If you already have evasion, you
gain improved evasion instead.Source Armor Master's Handbook pg. 21 (Amazon)
You can spend 5 stamina points to benefit from this feat even if there are no adjacent allies who also have this feat. However, if you fail your save, you are knocked prone. (Dragonslayer’s Handbook 21)