Globe of Invulnerability

[Caliban]

Well, that's not at all what I said, and you can feel however you like. I'm just stating my opinion according to my understanding of the rules, and it is that casting is not a magical effect. Spells are.
[/b]

And once you cast the spell, it still has to travel from you to where you want it to take effect. It doesn't skip over the intervening area, it has to travel through it. And thus it would be suppressed when it hit the AMF he's standing in.

By your logic, a plane of glass would stop Line of Effect for most spells, but not an area where magic is suppressed. This is neither logical, nor implied by the rules.

[/b]
When you cast Detect Magic on a wizard casting a spell with a casting time of, say, 10 minutes, do you detect an aura? (assuming no magic items or other spell effects on the wizard at the time).

If your answer is yes, we disagree, but your logic holds.
[/b]

Since he's summoning magic by his spellcasting, of course you would.

 

[andargor]

And once you cast the spell, it still has to travel from you to where you want it to take effect. It doesn't skip over the intervening area, it has to travel through it. And thus it would be suppressed when it hit the AMF he's standing in.

By your logic, a plane of glass would stop Line of Effect for most spells, but not an area where magic is suppressed. This is neither logical, nor implied by the rules.

Since he's summoning magic by his spellcasting, of course you would.

Ok, I've read the FAQs, and I concede that you cannot cast a spell from inside an AMF to the outside, or through an AMF. It blocks line of effect, a point I wasn't sure about. Personal spells, I may still debate, however (Touch spells need to discharge, so that is magic). But that's entirely dependent on the "casting is magic" vs. "casting is not magic, the result is" point of view.

Does an antimagic field suppress a spell effect at the point of origin or the area of effect? For instance, if I cast silence on myself and then cast antimagic field (assuming I have the Silent Spell feat), would the entire silence spell be suppressed (because it’s centered on me), or just the 10-foot radius surrounding me, leaving a 5-foot ring of silence around the outside of the antimagic field?

It depends on the spell. Silence is an emanation, so the whole effect is suppressed if the point from which the effect emanates is inside the antimagic field. With an area spell, only the part of the area that is within the antimagic field is suppressed. Note that the antimagic field blocks line of effect, so an area cannot extend through the antimagic field. For example, if you brought the antimagic field into a fog cloud effect, only the portion of the fog cloud that is within the antimagic field would be suppressed. On the other hand, if you cast antimagic field in a corridor 10 feet wide, the fog cloud effect could not spread past the antimagic field. Note that a spread effect will flow around an antimagic field if it has space to do so, just as it would spread around any other barrier.

I don't want to hijack the thread, but a plane of glass would stop line of effect. By the rules, any solid barrier stops line of effect. There's a related entry in the FAQ:

The apparatus of Kwalish has presented some problems for my group. Can you cast spells with a range through the apparatus? Specifically, can a wizard inside the apparatus (not operating the levers) cast a dispel magic spell at a target or area outside the apparatus? Does being a magic item prevent the apparatus from being treated like any other obstruction?

Any solid barrier blocks magic by blocking line of effect between the caster and the spell’s target or area. You can’t cast spells through the hull of an apparatus of Kwalish without opening the hatch (and flooding the vehicle if it is submerged). Likewise, a closed window blocks line of effect for spells.

And more in line with the starting topic, you can cast within a Globe of Invulnerability but the effect is suppressed. Of course, they say that a GoI doesn't block line of effect...

The spells minor globe of invulnerability and globe of invulnerability create a spherical emanation with a 10-foot radius. Does this assume an effect that fills in the whole of the sphere, like a standard spell area, or is it a hollow sphere that prevents spell effects from crossing into it? Is a spellcaster within the globe affected by her own spells?

The effect fills the entire globe. No spell has any effect inside the globe, even spells a character casts on herself. Unlike an antimagic field, the globe does not block line of effect. A character can cast spells from inside the globe to the outside, or from outside the globe, through the globe, to another place outside the globe—but never inside the globe. Note that the globe only suppresses spells. If you’re in the globe and you cast a spell on yourself, the spell’s duration starts running, but there is no effect. If you later leave the globe, the spell takes effect.

Andargor, the less confused

 

[Caliban]

I don't want to hijack the thread, but a plane of glass would stop line of effect. By the rules, any solid barrier stops line of effect. There's a related entry in the FAQ:

I never said it didn't. I was saying that it was silly to think a plane of glass would stop a spell where an AMF wouldn't.

 

[AuraSeer]

"Pane of glass" is good, but my canonical example is a sheet of paper. Or sometimes a soap bubble.

 

[KarinsDad]

I'm not debating whether it should be that way or not, but what is written.

Fine.

Let's debate what is written.

Can a caster cast a spell outside of the area of effect of the AMF from inside it? Two different arguments as to why the caster cannot:

1) "line of effect: A straight unblocked line between two points relevant to the spells effect."

"A line of effect is a straight unblocked path that indicates what a spell can affect."

"The space within this barrier is impervious to most magical effects, including spells, ..."

So, line of effect for a spell requires two points and the path (or line) in between in order to achieve a spell effect, not just the destination point. The space within the barrier is impervious to magical effects, hence, to lines of effect.

Since one of the points of the line of effect is within the AMF and the space within the AMF is impervious to spell effects, it is impossible to cast within an AMF.

"If you ever try to cast a spell in conditions where the characteristics of the spell (range, area, etc.) cannot be made to conform, the casting fails and the spell is wasted."

Since one point within the line of effect is also within a space which is imperious to magical effects, you are casting where one characteristic of the spell (line of effect) cannot be made to conform. Hence the phrase "Line of effect", not "Line of sight": the magic travels along the path of this line and since magic is suppressed, it cannot travel along this path to exit the area of effect of the AMF.


2) DMG page 72:

"Antimagic Field - Does an antimagic field or similar magic suppress the ability?"

"Table 3-12: Spell-like Yes"

"No supernatural ability, spell-like ability, or spell works in an area of antimagic."

DMG page 71:

Hence, AMF suppresses spell-like abilities completely. Not just the effect, but the spell-like ability (i.e. the ability to create a spell-like effect). So, if your POV were correct, then AMF would allow a spell caster to cast a spell through the area of the AMF, but a creature could not use a spell-like ability (since the ability is suppressed) to do the same thing. Nothing in the rules indicates that from the perspective of cause and effect that there is a different between spell abilities and spell-like abilities. In fact, the indication is that the rules indicate that spell-like abilities are spells:

"Spell-like abilities, as the name implies, are spells and magical abilities very much like spells."

Why would AMF be any different between spells and spell-like effects? There are no rules that allow for a difference.



From these rules, it is clear that magic does not work within or through an antimagic field. Period.

There do not appear to be any rules to support your POV or if there are, please quote them.

 

[andargor]

There do not appear to be any rules to support your POV or if there are, please quote them.

I did. I was debating casting as being a spell or magical effect, but I wasn't sure about AMF blocking line of effect. The FAQ clarified the latter: it does block it.

Andargor