Entrench

Legacy Content

Source Treasure Vault pg. 218 1.1
You can position yourself in the armor or reposition its articulated pieces to better protect against some attacks. If you're trained in this armor, while wearing it you can spend a single action to gain a +1 circumstance bonus to AC against a certain type of attack until the start of your next turn. The entrench trait lists the type of attack this bonus applies against, typically entrench melee or entrench ranged.