Greenfield
Adventurer
The rules also don't specify whether a club or axe works in an AMF. They only mention swords. The "lack of omission" argument lacks.
What the spell does say is that magical items or effects are suppressed, not dispelled, and that any that leave the AMF (or the AMF moves away from) will resume.
So anything passing through can do so, they simply don't exist within the space of the AntiMagic field.
The fact is, neither the spell description, nor the description of Anti-Magic in general, ever mention anything resembling "line of effect".
And they do specifically say that the AMF doesn't dispel anything.
But let's pick an example other than Fireball. The tiny bead can be seen as a "thing", and the rules are pretty clear that magic "things" can enter (and be suppressed) then leave again and resume normal function.
Let's look instead at two spells: Lightning Bolt and Chain Lightning.
If you cast a Lightning Bolt through an AMF, you're looking at a "line of effect" that is also the area of effect. Areas of effect are explicitly discussed in the AMF spell description.
Now let's look at Chain Lightning. You cast Chain Lightning at a group of opponents, the primary target of which is on the far side of an AMF. What happens?
According to the SRD (the same clip in fact), as long as the center of effect isn't in the AMF, the spell works normally. You didn't try to create any spell effect inside the AMF area, nor did the point of origin land inside the AMF. You're clean.
Now the idea that you can cast self-buffs while inside is odd, and highly debatable. I've generally fallen on the side of the debate that says "Why not?" though. The AMF doesn't say you can't cast while inside, you just cant have the target or the starting point of an area be within the field.
That sets a dangerous precedent however, making the AMF the highest form of Globe of Invulnerability, the one that stops all incoming spells, yet lets you cast spells from within with impunity. Okay, okay, rays and cones won't work since the point of origin is you, and you're in the field, but you know what I mean. If you could somehow approach the edge of the AMF then rays and cones would come back into play, since they begin at a corner of your square, and that corner could be out of or at the edge of the field. However, since the AMF is always centered on the caster and has a 10 foot radius, you'd need to have a lot of Reach to pull that one off.
(For the record, the best version of the Globe theme is a Cube of Force. One setting stops any and all spells from entering the area. It says nothing about spells going out.
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The argument for or against allowing casting spells while inside the AMF really balances on a few key words: "used within..." As in,
Now the AMF description goes on to say that summoned creatures "wink out" while in the area of an AMF, but says that Golems and such operate normally. Which is odd, since the creation of any Golem uses an Earth Elemental's spirit to give them life. Does that mean that the writers overlooked an obscure detail, or is it an intentional exception? I suspect that it's both.
In any case, I've digressed more than enough. There's nothing to say or suggest that "Line of effect" is interrupted by AMF, and at least one example (Lightning bolt, where Area of Effect and Line of Effect are the same) that seems to break that argument. The various Ray spells would fall into that same category. The "line of effect" many be interrupted, but continues normally once past the AMF, because that's what happens to the "area of effect", and for those spells the two are the same.
What the spell does say is that magical items or effects are suppressed, not dispelled, and that any that leave the AMF (or the AMF moves away from) will resume.
So anything passing through can do so, they simply don't exist within the space of the AntiMagic field.
The fact is, neither the spell description, nor the description of Anti-Magic in general, ever mention anything resembling "line of effect".
And they do specifically say that the AMF doesn't dispel anything.
But let's pick an example other than Fireball. The tiny bead can be seen as a "thing", and the rules are pretty clear that magic "things" can enter (and be suppressed) then leave again and resume normal function.
Let's look instead at two spells: Lightning Bolt and Chain Lightning.
If you cast a Lightning Bolt through an AMF, you're looking at a "line of effect" that is also the area of effect. Areas of effect are explicitly discussed in the AMF spell description.
So the AMF may cause a gap in the bolt, but the bolt will resume on the far side of the AMF and will "still function in the normal area". That's pretty clear.SRD said:• Spell areas that include both an antimagic area and a normal area, but are not centered in the antimagic area, still function in the normal area. If the spell’s center is in the antimagic area, then the spell is suppressed.
Now let's look at Chain Lightning. You cast Chain Lightning at a group of opponents, the primary target of which is on the far side of an AMF. What happens?
According to the SRD (the same clip in fact), as long as the center of effect isn't in the AMF, the spell works normally. You didn't try to create any spell effect inside the AMF area, nor did the point of origin land inside the AMF. You're clean.
Now the idea that you can cast self-buffs while inside is odd, and highly debatable. I've generally fallen on the side of the debate that says "Why not?" though. The AMF doesn't say you can't cast while inside, you just cant have the target or the starting point of an area be within the field.
That sets a dangerous precedent however, making the AMF the highest form of Globe of Invulnerability, the one that stops all incoming spells, yet lets you cast spells from within with impunity. Okay, okay, rays and cones won't work since the point of origin is you, and you're in the field, but you know what I mean. If you could somehow approach the edge of the AMF then rays and cones would come back into play, since they begin at a corner of your square, and that corner could be out of or at the edge of the field. However, since the AMF is always centered on the caster and has a 10 foot radius, you'd need to have a lot of Reach to pull that one off.
(For the record, the best version of the Globe theme is a Cube of Force. One setting stops any and all spells from entering the area. It says nothing about spells going out.

The argument for or against allowing casting spells while inside the AMF really balances on a few key words: "used within..." As in,
When you cast a spell intended to "go off" outside the AMF, is that spell being "used within" the AMF? Doesn't seem like it to me, but you already know which side of the balance my opinion falls on.SRD said:An antimagic field suppresses any spell or magical effect used within, brought into, or cast into the area, but does not dispel it.
Now the AMF description goes on to say that summoned creatures "wink out" while in the area of an AMF, but says that Golems and such operate normally. Which is odd, since the creation of any Golem uses an Earth Elemental's spirit to give them life. Does that mean that the writers overlooked an obscure detail, or is it an intentional exception? I suspect that it's both.
In any case, I've digressed more than enough. There's nothing to say or suggest that "Line of effect" is interrupted by AMF, and at least one example (Lightning bolt, where Area of Effect and Line of Effect are the same) that seems to break that argument. The various Ray spells would fall into that same category. The "line of effect" many be interrupted, but continues normally once past the AMF, because that's what happens to the "area of effect", and for those spells the two are the same.