Casting and AoO

[Weaponbreaker]

So say I have reach and I'm casting Summon I and someone comes through a threatened square, what happens?
No AoO as full round casting "consumes all your actions that round."
AoO are a no action so you can make them while casting a full round action.
Sacrifice the spell to take an AoO.

[Razhen]

Weaponbreaker wrote:

So say I have reach and I'm casting Summon I and someone comes through a threatened square, what happens?

No AoO as full round casting "consumes all your actions that round."
AoO are a no action so you can make them while casting a full round action.
Sacrifice the spell to take an AoO.

Someone correct me if I'm wrong, but I would rule that no, you can't take that AoO. You are casting a spell, not wielding your weapon. Sure, you may still be holding your weapon, but in order to gain an AoO you must be threatening with it and you cannot threaten while you are casting.

[Gauss]

Assuming you are still wielding your weapon you still threaten and thus may still make an Attack of Opportunity.

The question is are you wielding it or not. In order to cast you must have 1 free hand and most weapons with reach require two hands. Thus, it would have to be a 1 handed or natural weapon with reach.

There is simply nothing in the rules stating that while casting you do not threaten or are not allowed to make an attack of opportunity. Making an AoO is not an action.

Make your attack and continue casting.

- Gauss

[Razhen]

I had to look it up because your answer made sense to me Gauss... but at the same time it didn't seem logical. This is taken from the Casting a Spell on the srd:

"Cast a Spell

...

You only provoke attacks of opportunity when you begin casting a spell, even though you might continue casting for at least 1 full round. While casting a spell, you don't threaten any squares around you.

This action is otherwise identical to the cast a spell action described under Standard Actions."

So, no, you are not threatening while you are casting a spell, therefore you do not even get the option of taking the AoO.

[Gauss]

Thanks Razhen, I didnt notice that when I was checking. :)

That fixes that.

- Gauss

[Calybos1]

Plus, there's the whip--a one-handed weapon with reach. Still, I agree that you can't make an AoO while casting.