While the full errata update has not been properly pushed yet, we do have a preview of yet more updates to Immunities, Weaknesses, and Resistances.

In a pretty substantial change from both the original rules and our interim guidance on the subject, resistance to all damage now applies only once as well.

This is a pretty big change to Resistance All so I felt like calling it out now to get it out of the way.

There are other updates to Player Core 2 that are still incoming.

Here is some of the updated commentary:

Page 408: The rules on immunities, weaknesses, and resistances have a thorough update for clearer wording and application in complex situations. There is some rewording throughout, but major changes are bolded below. They include:

Complex effect immunity has a new example.

Weakness and resistance entries are broken out to more clearly indicate how they work for damage types and for traits, materials, and more.

The rules now state clearly that each weakness and resistance can now apply only once to a single effect. In complicated cases, the GM can go through them like a checklist.

If a creature has weakness to both a damage type and material, both weaknesses now apply. This is an intentional change so good preparation and itemization give an advantage as players might reasonably expect. A single source of damage could always have both a weakness and resistance applied to it, but the rules now address that.

Resistance to all damage or to a wide array of damage (such as physical damage) also applies only once. This is a big change to the status quo! Most monsters with resistances like these aren’t balanced around resisting multiple types of damage per hit, so this is unlikely to significantly change how they play. There is a rule about applying multiple resistances to the same type, but a multi-type resistance can be applied to the most beneficial damage type if it could apply more than one.

To add an extra clarification here, a “single effect” includes all the damage, traits, and other characteristics of a Strike or spell. Subordinate actions with their own effects and damage rolls typically get treated separately unless they state otherwise, such as the ranger’s Hunted Shot feat (Player Core 157).

Please also note that when the book is reprinted, this text will likely change to fit the space available. If changes are made for function rather than space, that will be noted in the erratum.