在FAQ中有一個回應
Do you have to actively wield a weapon of defending to
use its power? Or could you hold a longsword of defending
in your left hand, not use it to attack (so you are not
actually using the two weapons) and still wield a sword in
your right hand without penalties? Or is the defending
bonus considered part of the normal parrying that happens
in the background?
Using a weapon of defending works just like the Expertise
feat. (You have to use an attack or full attack action.) You can't
use the weapon like a shield; if you hold the weapon in your off
hand and claim an Armor Class bonus for it, you take all the
penalties for fighting with two weapons, even if you don't
actually attack with the weapon.
雖然是三版的FAQ，但考慮到3.5跟三版的護身敘述一樣，
所以我是覺得如果不攻擊就不能拿到AC
