The Conduct Energy free action states as a requirement:

Your last action or spell this turn had the acid, cold, electricity, fire, or sonic trait.

The Conducting rune grants a weapon etched with it the Resonant trait, granting access to Conduct Energy.

If I etched that same weapon with, say, a Corrosive rune, would it grant any Strikes made with that weapon the Acid trait?

If so, does that mean that the following sequences of events is legal, RAW?

  • First action: Strike (with the acid trait)
  • Free action: Conduct Energy
  • Second action: Strike (with the Conducting rune now active)

If so, does this mean that the second Strike would deal x[W] + 1d6 acid damage + 1d8 acid damage, where x is the number of weapon damage dice and W the weapon damage die?

tl;dr Does having a Rune with e.g. the Cold trait on a weapon make Strikes with that weapon also inherit said trait?

My gut says yes, as this seems to be the mechanism by which magic weapons grant Strikes the Magical trait:

Ghosts and other incorporeal creatures have a high resistance to physical attacks that aren't magical (attacks that lack the magical trait).

  • 4
    \$\begingroup\$ Tangential, the Conducting rune does +1d8 damage, not +Xd8 damage. "The weapon deals an additional 1d8 damage of the selected type instead of 1 additional damage per die" \$\endgroup\$
    – WeirdFrog
    Aug 26 at 15:27
  • \$\begingroup\$ Thanks, I glossed over the content a little too much I think \$\endgroup\$
    – Ben R.
    Aug 26 at 21:45
  • \$\begingroup\$ Why would I want to deal +1d6 acid on the first strike, and +1d6+1d8 on the second, when I could deal 1d6 acid + 1d6 cold on both? (Frost rune as second, instead of Conducting) Money is usually abundant. \$\endgroup\$
    – András
    Aug 28 at 14:49

Yes, an acid weapon would have the acid trait by CRB page 451, Damage Types and Traits, quoted below.

Damage Types and Traits When an attack deals a type of damage, the attack action gains that trait. For example, the Strikes and attack actions you use wielding a sword when its flaming rune is active gain the fire trait, since the rune gives the weapon the ability to deal fire damage.

Yes, that sequence of actions would be legal. Perhaps even more interesting is that you could take the Conduct Energy reaction after the second attack as well, doubling up on the additional damage.

No, you wouldn't deal quite that much damage. As @WeirdFrog mentioned, conducting weapons only deal an additional 1d8, not xd8 as you've suggested.

  • \$\begingroup\$ Welcome to the site! I've added the quote from the CRB that you're referencing. Its always good to provide a quote or link if you're referencing a rules entry somewhere. \$\endgroup\$
    – Cellion
    Aug 26 at 17:19
  • 2
    \$\begingroup\$ Note that the "Damage Types and Traits" section on page 451 may be limited to the 1st printing of the CRB. Although it exists in my hard copy, I couldn't find it on the SRD, and I found some discussion on Reddit that the section had been omitted from newer printings, without any Paizo comment on why. \$\endgroup\$
    – Cellion
    Aug 26 at 17:22
  • \$\begingroup\$ Good to know, I was hoping to quote that as well but couldn't find it online either. Thanks for putting that in there! \$\endgroup\$
    – brandon
    Aug 26 at 17:25
  • 1
    \$\begingroup\$ Doesn't seem to have been listed under Paizo's official FAQs for the book, so I could see it as an error/type-fitting cut as opposed to a deliberate rule change. Definitely good to keep in mind though, that rule doesn't make much sense when thinking about things like flaming swords underwater doing nothing—maybe it was removed intentionally and the FAQ is just missing that section. \$\endgroup\$
    – brandon
    Aug 26 at 17:36

Magical Weapons

To clear up a misconception first, a magical weapon is defined as any weapon with any rune on it. By necessity, the first rune must be +1 (or striking, technically, since it doesn't "require" a Potency rune like Property runes do... although you should probably get the +1). This can be seen on the Magic Weapon (equipment) entry.

Regardless, Rune traits probably get inherited

Nothing about Runes, including Fundamental Runes and Weapon Property Runes says that the Traits are part Strikes using that weapon (but nothing says they aren't, either). So why "probably"? Looking at Specific Magic Weapons such as Flame Tongue or Frost Brand, we can see that they do have the appropriate traits. As does the less-obviously-energy-attuned Blade of the Black Sovereign.

  • 1
    \$\begingroup\$ Notably, I don't know if this is even overpowered, since this would only apply to the second and later strikes on your turn. The bonus persistent damage on crit is less than the flaming rune's persistent damage as well. With the way weaknesses work, more damage of the same type won't even matter, since you'll only get the weakness bonus once. \$\endgroup\$
    – ESCE
    Aug 26 at 16:28
  • 1
    \$\begingroup\$ @ESCE, it is underpowered, by the time you can have a second property rune (level 10), the 200 gp difference between a Conducting and a Frost (for example) rune is less than 10% of your expected wealth. Frost happens on your first attack, and can trigger a different weakness. \$\endgroup\$
    – András
    Aug 29 at 11:39

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