From Pathfinder Claws of the Tyrant, which isn't enabled.

Cautious Word

FEAT 12

ARCHETYPE

Activity free action

Archetype Magaambyan Attendant

Prerequisites Uzunjati Storytelling; ability to cast shield

Frequency once per round

Trigger An enemy hits you with a Strike.

Requirements You're currently unable to cast Shield because you used Shield Block with it.

You let your words defend you, just as your allies in the Vellumis Scholars defend through knowledge. You immediately cast shield and gain its bonus to AC even though you normally couldn't cast it, and you become Slowed 1 for 1 round.

Pathfinder Claws of the TyrantORC