You are willing to use your allies as shields to ward off attacks aimed at you. Or you are willing to allow yourself to be used as such.
Benefit(s): Whenever you are the target of a melee or ranged attack and are adjacent to an ally who also has this feat, you can initiate this feat to skillfully pull the abettor into harm’s way or dodge behind the abettor as an immediate action. You may use this feat after you learn the result of the attack roll.
You gain cover against that attack (and only that attack). If the attack misses you but would have hit you if not for the cover bonus to your armor class, the abettor becomes the target of the attack and the attacker must make a new attack roll (with all the same modifiers) against the abettor’s armor class.
Betrayal feats are somewhat unique amongst teamwork feats. While these feats can be taken and granted to other characters via teamwork granting abilities, allies who have been granted a betrayal feat can only use such feats as initiators, not as abettors. For example, a knight could not grant an ally the ally shield feat and then use his ally as a shield, but he could allow an ally to use him as a shield.
