Energy Immunity & Vulnerability interaction?

[Sahleb]

So, Tempest Stormwind talked about how putting an energy vulnerability on a monster cancelled out immunity. I can't find that rule referenced anywhere. Does anyone know why he thought this was the case in the 3.5e rules?

I need to kill something big, preferably with fire.

[Troacctid]

It's the opposite. Putting immunity on a creature negates its vulnerability. No matter which order you apply them in, no damage is dealt.

[Sian]

Vulnerability adds +50%, while Immunity makes you take 0 damage ... 0+50% = 0, if added the other way around you'll end your roll calculations by substituting your result with 0.

[ahenobarbi]

You want Searing Spell feat from Sandstorm (spell ignores fire resstance, immune creatures get half damage, +1 spell level).

[PallentisLunam]

You want Searing Spell feat from Sandstorm (spell ignores fire resstance, immune creatures get half damage, +1 spell level).

There are several feats like this that turn half of the damage dealt by a spell into a different type of damage that generally bypasses any immunity the target has to the original damage type. Violate Spell comes to mind.

[Sahleb]

There are several feats like this that turn half of the damage dealt by a spell into a different type of damage that generally bypasses any immunity the target has to the original damage type. Violate Spell comes to mind.

Or all of it, with the right ability. Silver Pyromancer, for example.

[PallentisLunam]

Or all of it, with the right ability. Silver Pyromancer, for example.

Well yes, but smoked Gouda isn't exactly my favorite cheese :smalltongue:

[Sahleb]

Well yes, but smoked Gouda isn't exactly my favorite cheese :smalltongue:

Heh. :smallredface:

[Necroticplague]

So, Tempest Stormwind talked about how putting an energy vulnerability on a monster cancelled out immunity. I can't find that rule referenced anywhere. Does anyone know why he thought this was the case in the 3.5e rules?

I'm pretty sure there's a Sage ruling to that extent. However, like in many other cases, the Sage is wrong. Having an energy immunity cancels out your vulnerability, regardless of what order you do it in (If you apply vulnerability first, you get 1.5(DAMAGE)*0=0. Apply immunity first, you get 0(DAMAGE)*1.5=0).