Charged Water Blast vs Golems

[Aristophanes]

Since the Composite Charged Water Blast is a physical blast, would a golem take all the damage, or still be immune to the electrical damage? * This assumes it's a golem normally not affected by magical elecricity*

[Melkiador]

If the creature is immune to electricity, then it would be immune to the electric damage. This doesn't seem to be specific to golems. For instance, demons are immune to electrical damage. They would not be damaged by the half of the composite blast that is electricity.

[Aristophanes]

Melkiador wrote:

If the creature is immune to electricity, then it would be immune to the electric damage. This doesn't seem to be specific to golems. For instance, demons are immune to electrical damage. They would not be damaged by the half of the composite blast that is electricity.

But would it be subject to a golem's normal immunity to magic?

A Kineticist's blast counts as magic when considering creatures that are resistant or immune to non-magical effects, but physical blasts are not subject to SR.

[Melkiador]

As written, the golem magic immunity wouldn't apply to composite physical blasts.

Quote:

Spell resistance doesn't apply against physical blasts.

Quote:

Immunity to Magic (Ex) An iron golem is immune to spells or spell-like abilities that allow spell resistance.

I'm not sure if that's an oversight, though.

[Aristophanes]

Melkiador wrote:

As written, the golem magic immunity wouldn't apply to composite physical blasts.

Quote:

Spell resistance doesn't apply against physical blasts.

Quote:

Immunity to Magic (Ex) An iron golem is immune to spells or spell-like abilities that allow spell resistance.

I'm not sure if that's an oversight, though.

Yeah, that's what I think too.

Thank you for your council.

[Azothath]

basics

Kinetic Blast (Sp):

...Simple Blast... All damage from a kinetic blast is treated as magic for the purpose of bypassing damage reduction. Kinetic blasts count as a type of weapon for the purpose of feats such as Weapon Focus. The kineticist is never considered to be wielding or gripping the kinetic blast (regardless of effects from form infusions; see Infusion on page 12), and she can’t use Vital Strike feats with kinetic blasts. Even the weakest kinetic blast involves a sizable mass of elemental matter or energy, so kinetic blasts always deal full damage to swarms of any size (though only area blasts deal extra damage to swarms). A readied kinetic blast can be used to counterspell any spell of equal or lower level that shares its descriptor. A kinetic blast that deals energy damage of any type (including force) has the corresponding descriptor. The various kinetic blasts, as well as additional rules for simple blasts, are described on pages 15–16.
===end===

Kineticist Wild Talents includes description of Composite Blasts (as new blasts), Energy & Physical Blasts.
Simple Blasts... Composite Blasts... Physical blasts are ranged attacks that deal an amount of damage equal to 1d6+1 + the kineticist’s Constitution modifier, increasing by 1d6+1 for every 2 kineticist levels beyond 1st. Spell resistance doesn’t apply against physical blasts. Energy blasts are ranged touch attacks that deal an amount of damage equal to 1d6 + 1/2 the kineticist’s Constitution modifier, increasing by 1d6 for every 2 kineticist levels beyond 1st.

Wild Talent: Charged Water Blast:

Source Occult Adventures pg. 16, ...
Element air, water; Type composite blast (Sp); Level —; Burn 2
Prerequisite electric blast, water blast
Blast Type physical; Damage half bludgeoning, half electricity
You slam a single foe with a stream of electrically charged water.
===end===

so, RAW talks about SR not applying to "physical blasts".
CompBlst: Chg'd Wtr Blst is ranged (dmg)B[elec] "physical blast".

Construct type
ye olde Stone Golem
Immunity to Magic (Ex) A stone golem is immune to any spell or spell-like ability that allows spell resistance. In addition, certain spells and effects function differently against the creature, as noted below....

so no SR takes care of Immunity to Magic. Construct type had the immune to Fort save effects but not if they effect objects which I assume this blast does.
The B[elec] means you need to check DR, Energy Resistance, etc. My only waffle here is how stone's Hardness of 8 is going to play a role (Y or N) as usually it's a N for creatures but this is kinda special and in the GM's lap. For damaging objects & hardness, energy & ranged weapon attacks inflict only dmg/2 on objects (here is both ranged and half [elec]). DR 10/admantine IS pretty tough.

I'm going to add my usual "as a PC you have to make some kind of Skill Check to know the details of these corner cases" or at least spend time experimenting with GM oversight so you both know what's going to happen. Just springing it on a GM and saying "Ah HA! the posters on the rules forum said this is how it works" is not so friendly.