Greater Spell Immunity: Antimagic Field

[moritheil]

What exactly happens? At first glance, I'd guess that a GSI: AMF recipient wouldn't be able to cast into or through the field, but his magic items would still work. However, depending on interpretation, is it possible to cast through the field, so long as the effect lies outside? That would mean that one party member could put AMF up while others enjoy GSI: AMF and nuke the opposition from within the safety of AMF.

Am I, in fact, the ruiner of worlds (or of game balance?)

Spell Immunity, Greater
This spell functions like spell immunity, except the immunity applies to spells of 8th level or lower.

A creature can have only one spell immunity or greater spell immunity spell in effect on it at a time.

Antimagic Field


An invisible barrier surrounds you and moves with you. The space within this barrier is impervious to most magical effects, including spells, spell-like abilities, and supernatural abilities. Likewise, it prevents the functioning of any magic items or spells within its confines. An antimagic field suppresses any spell or magical effect used within, brought into, or cast into the area, but does not dispel it. Time spent within an antimagic field counts against the suppressed spell’s duration.

Summoned creatures of any type and incorporeal creatures wink out if they enter an antimagic field. They reappear in the same spot once the field goes away. Time spent winked out counts normally against the duration of the conjuration that is maintaining the creature. If you cast antimagic field in an area occupied by a summoned creature that has spell resistance, you must make a caster level check (1d20 + caster level) against the creature’s spell resistance to make it wink out. (The effects of instantaneous conjurations are not affected by an antimagic field because the conjuration itself is no longer in effect, only its result.)

A normal creature can enter the area, as can normal missiles. Furthermore, while a magic sword does not function magically within the area, it is still a sword (and a masterwork sword at that). The spell has no effect on golems and other constructs that are imbued with magic during their creation process and are thereafter self-supporting (unless they have been summoned, in which case they are treated like any other summoned creatures). Elementals, corporeal undead, and outsiders are likewise unaffected unless summoned. These creatures’ spell-like or supernatural abilities, however, may be temporarily nullified by the field. Dispel magic does not remove the field, though Mage's Disjunction might.

Two or more antimagic fields sharing any of the same space have no effect on each other. Certain spells, such as wall of force, prismatic sphere, and prismatic wall, remain unaffected by antimagic field (see the individual spell descriptions). Artifacts and deities are unaffected by mortal magic such as this.

Should a creature be larger than the area enclosed by the barrier, any part of it that lies outside the barrier is unaffected by the field.

Arcane Material Component

A pinch of powdered iron or iron filings.

 

[Thanee]

What exactly happens?

Nothing, unless you are a summoned creature.

Bye
Thanee

 

[Rkhet]

Greater Spell Immunity:

This spell functions like spell immunity, except the immunity applies to spells of 8th level or lower.

Spell Immunity:

The warded creature is immune to the effects of one specified spell for every four levels you have. The spells must be of 4th level or lower. The warded creature effectively has unbeatable spell resistance regarding the specified spell or spells. Naturally, that immunity doesn’t protect a creature from spells for which spell resistance doesn’t apply. Spell immunity protects against spells, spell-like effects of magic items, and innate spell-like abilities of creatures. It does not protect against supernatural or extraordinary abilities, such as breath weapons or gaze attacks.

Only a particular spell can be protected against, not a certain domain or school of spells or a group of spells that are similar in effect.

A creature can have only one spell immunity or greater spell immunity spell in effect on it at a time.

Antimagic Field:

Abjuration

Level: Clr 8, Magic 6, Protection 6, Sor/Wiz 6

Components: V, S, M/DF

Casting Time: 1 standard action

Range: 10 ft.

Area: 10-ft.-radius emanation, centered on you

Duration: 10 min./level (D)

Saving Throw: None

Spell Resistance: See text

An invisible barrier surrounds you and moves with you. The space within this barrier is impervious to most magical effects, including spells, spell-like abilities, and supernatural abilities. Likewise, it prevents the functioning of any magic items or spells within its confines.

An antimagic field suppresses any spell or magical effect used within, brought into, or cast into the area, but does not dispel it. Time spent within an antimagic field counts against the suppressed spell’s duration.

Summoned creatures of any type and incorporeal undead wink out if they enter an antimagic field. They reappear in the same spot once the field goes away. Time spent winked out counts normally against the duration of the conjuration that is maintaining the creature. If you cast antimagic field in an area occupied by a summoned creature that has spell resistance, you must make a caster level check (1d20 + caster level) against the creature’s spell resistance to make it wink out. (The effects of instantaneous conjurations are not affected by an antimagic field because the conjuration itself is no longer in effect, only its result.)

[...]


Conclusion: It is useless except on summoned monsters.

 

[Rkhet]

argh. beaten!

 

[moritheil]

Revision: You use GSI: AMF on some summoned spellcasting allies and then put AMF up. Does that get around it, or would you say that they stick around, but still can't cast?

 

[Thanee]

Then they don't wink out, but still cannot cast spells... *shrug*

Of course, the AMF would suppress the GSI and then they would wink out, anyways, unless they can beat the AMF with their own spell resistance.

Bye
Thanee

 

[moritheil]

Then they don't wink out, but still cannot cast spells... *shrug*

Of course, the AMF would suppress the GSI and then they would wink out, anyways, unless they can beat the AMF with their own spell resistance.

Bye
Thanee

That's another thing I wanted to ask about: Do you consider the GSI rendering unbeatable SR first, or the AMF rendering GSI inoperative first?

Getting back to the original thrust, do you know of any ways short of epic level goofiness to have an AMF up with your allies unaffected and casting through it? AMF lists prismatic wall and wall of force as being unaffected by it, but you can't cast through those (which is probably why they're listed.)

 

[Rkhet]

Only thing I can think of is Extraordinary Spell Aim. And even then you can't cast anything with a range greater than 'self'.

 

[Thanee]

Antimagic Field + Extraordinary Spell Aim + Project Image should work.

Bye
Thanee

 

[moritheil]

To clarify: What I'm talking about with the WoF and prismatic wall spells is the fact that, as I understand it, AMF doesn't go through them, so if you had someone wrapped in a WoF within the AMF, they wouldn't be affected. Correct me if I'm wrong.