Warlock's Caster's Defense

[Ralf]

Caster's Defense (Su) wrote:

The warlock vigilante gains Combat

Casting as a bonus feat. When he successfully casts
defensively, he gains DR/magic equal to 1/2 his vigilante
level for 1 round. He gains this benefit only if he is
threatened by a creature that could have made an attack of
opportunity against him had he failed the check. At 10th
level, this DR also requires an alignment to overcome. The
warlock vigilante must choose an alignment opposed to
one alignment axis of his vigilante identity, and once he
chooses an alignment, he can’t change it.

As I understand it, when you cast defensively creatures don't get an AoO if you fail, you just lose the spell. Am I wrong or is this worded incorrectly. Perhaps it should say something like:

I wrote:

He gains this benefit only if he is

threatened by a creature that could have made an attack of
opportunity against him had he failed to cast defensively.

or even more simply

I wrote:

He gains this benefit only if he is

threatened by an enemy creature.

[Logan Bonner]

Yes, Ralf, your first version of this is correct. I'll make a note to fix the wording. Thank you!

[Zwordsman]

Kind of hopping on this rather than making a new one..

Does caster's defense not allow you to use a shield then?
not a terrible big deal considering there are a few shields with 0 failure. but thought i should ask

[master_marshmallow]

New version got changed, it now grants the ability to cast in armor.

[Zwordsman]

Isn't things always listed as "armour and shields" as in they're different for them?

Like version 2 says light armour and then medium armour.
Shields don't fit into any of those categories right? (i mean there are light shields and heavy shields but they seem to be categorized differently. and bucklers too)

or was an even more updated version out?

[Imbicatus]

Shields are not covered by Caster's Defense. However, the ASF on a mithral light shield or buckler is 0%, so it's mostly moot.