Spell Resistance, Clarify Plz.

[Kerilstrasz]

D&D Glossary (http://www.wizards.com/default.asp?x=dnd/glossary&term=Glossary_dnd_spellresistance&alpha=) reads the following regarding to RS...

Check spell resistance only once for any particular casting of a spell or use of a spell-like ability. If spell resistance fails the first time, it fails each time the creature encounters that same casting of the spell. Likewise, if the spell resistance succeeds the first time, it always succeeds. For example, a succubus encounters Jozan's blade barrier spell. If the cleric makes a successful roll to overcome the spell resistance of the succubus, the creature takes damage from the spell. If the succubus survives and enters that particular blade barrier a second time, the creature will be damaged again. No second roll is needed. If the creature has voluntarily lowered its spell resistance and is then subjected to a spell, the creature still has a single chance to resist that spell later, when its spell resistance is up.

So.. does that mean that if a creature with SR is succesfully resist a fireball
cant get hit by a fireball again ever??
or by fireball casted the same way??
or by fireball casted by the same source??
or it means that it cant be subject for 2nd(or 3rd...) time by a spell with continuus effect that allready resisted the 1st time it took place??

[Flickerdart]

The last one. If a creature's SR resists a Fireball, the next fireball cast on it is a different casting, and the text explicitly says that you check SR once per casting. If a creature's SR resists a Power Word Pain, on the other hand, it will take no damage from PWP even though PWP's damage is spread out along several rounds.

[Kerilstrasz]

Thnx a lot

[VGLordR2]

The fourth option that you listed is correct. Once SR fails, it always fails against that one individual spell. If more spells of the same kind are cast, SR will still have a chance to be applied. The check is always once per casting to resist that particular casting.

[Alanzeign]

None of that is mentioned in SRD, so it isn't necessarily core, not that that would necessarily matter.

I believe the intention of that paragraph means that if spell resistance successfully resists blade barrier (the example in question) then it is resisted for the duration of the spell. Blade barrier persists through multiple rounds, while a fireball is instantaneous. If a 2nd or 3rd blade barrier spell was cast, I am under the impression that each individual casting of that spell would have a chance to overcome spell resistance and likewise have a chance to fail.

And I was ninja'd just now.

The idea is that SR is challenged per casting, not per round or other measurement of time.

[Re'ozul]

Huh, so does this mean if you cast a CL9 Magic Missile at something with SR, that if it resists the first projectile it resists all and same for failing to resist the first projectile?

[mattie_p]

None of that is mentioned in SRD, so it isn't necessarily core, not that that would necessarily matter.

None of what now is not mentioned in the SRD? Spell Resistance (http://www.d20srd.org/srd/specialAbilities.htm#spellResistance)

And Re'ozul, yes. Magic missile is a targeted spell with a direct effect, and is affected by spell resistance. Each projectile is part of the same spell, and thus each is not checked separately.

[KillianHawkeye]

Huh, so does this mean if you cast a CL9 Magic Missile at something with SR, that if it resists the first projectile it resists all and same for failing to resist the first projectile?

That's correct, although there isn't really a "first" projectile since they all go at the same time.