Corrosive and Decaying Rune


Rules Discussion


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Hello, I have questions about Corrosive and Decaying Runes.

Corrosive :

Quote:
When you hit with the weapon, add 1d6 acid damage to the damage dealt. In addition, on a critical hit, the target's armor (if any) takes 3d6 acid damage (before applying Hardness); if the target has a shield raised, the shield takes this damage instead.

Decaying :

Quote:
When you hit with the weapon, add 1d4 void damage to the damage dealt. In addition, on a critical hit, the target takes 2d4 persistent void damage; if the target has a shield raised, the shield takes the same amount of persistent damage (its wielder rolls the flat check to see if the persistent damage ends, or the GM rolls if the shield is no longer in someone's possession). Unlike normal void damage, the void damage from a decaying rune damages objects, constructs, and the like by eroding them away.

1/ For the decaying rune, doesn't the target's amor take void damage ?

2/ Is it possible to obtain the broken condition on an armor ?

3/ A status penalty to AC from broken condition for an armor isn't cumulative with the status penalty from a clumsy condition, is it right ?

4/ A greater decaying rune ignores the immunity to void for the constructs, is it right ?
But the undead is healed by void effects ?

Thanks for your future answer.


1) The target's armor does not take void damage from the decaying rune unless you are directly attacking the target's armor, rather than the target themselves. Armor, like with most items, doesn't take damage unless it is directly attacked or otherwise harmed by an effect that specifically states it affects it (like a corrosive rune), which is generally unlikely to happen in most situations. The rules for armor (under "Damaging Armor") and item damage should hopefully explain this a bit more.

2) Absolutely, yes. Armor, like any item, becomes broken if its Hit Points fall equal to or under its Broken Threshold, which the item damage rules cover.

3) Correct, because both the penalty from broken armor and being clumsy are status penalties, you only apply the most severe penalty to your AC, and don't add the two.

4) A greater decaying rune will indeed ignore a construct's void immunity, but it will also ignore an undead's void immunity and damage them too. The only effects that heal a creature with void healing are effects that explicitly say they do, like a harm spell. Void damage by itself does not heal creatures with void healing, and they are simply immune to the void damage instead.


Are there only the greater decaying rune that ignores the immunity ?

Shock,thunder, fire, frost ... ?


Although greater versions of these damage runes will let the rune's damage ignore resistance, only the greater decaying rune from what I've seen lets you bypass immunity to its damage type.


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Pathfinder Adventure, Adventure Path, Lost Omens, Starfinder Adventure Path Subscriber

Expect some variance at the table on greater decaying affecting undead as the game rules are pretty careful to never call void healing an immunity to void damage.

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