In Harm’s Way

Combat

You put yourself in danger’s path to save your allies.

Prerequisite: Bodyguard.

Benefit: While using the aid another action to improve an adjacent ally’s AC, you can intercept a successful attack against that ally as an immediate action, taking full damage from that attack and any associated effects (bleed, poison, etc.). A creature cannot benefit from this feat more than once per attack.

Source: Advanced Player's Guide