I can't find any information regarding concentration on spells and if you lose them if hit by an attack. I've noticed that several spells have the trait "concentrate" but the trait description doesn't clear things up for me. Is there any section in the corebook I am missing where these rules are explained?
More specifically, Iam looking for information about taking damage while sustaining a spell. Does it make you lose it?
Disrupting an Action, core rules p. 462 (according to AoN, don't have the book here).
Basically, you can only lose a spell if you're disrupted while casting it (most commonly by being critically hit with an AoO) or while sustaining it. Note that Sustaining a Spell only has the Concentrate trait, which does NOT trigger AoOs (but might trigger other disrupting reactions from monsters and such). The same is true for verbal ocmponents, so only the somatic or material components of a spell can provoke an AoO.
As far as I understand, only abilities that actually say you disrupt an action can cause a disrupt. So readying a Strike with the Trigger "Enemy casts a spell" would not allow that Strike to automatically disrupt the spellcasting.
The Concentrate trait doesn't do anything on its own; it exists for the purposes of things like Barbarian Rage which says you can't perform actions with the Concentrate trait.
Ok, so then taking damage while sustaining a spell doesn't make you lose that spell?
Ok, so then taking damage while sustaining a spell doesn't make you lose that spell?
No, it doesn't.
Only if you're hit in the ver ymoment you use the Sustain action and only if the effect hitting you explicitely says it can disrupt actions with the concentrate trait.
I think at least the player classes don't get anything that disrupts Concentration. Would have to check the Bestiary to see how common something like that is. But as a whole, it seems much less likely to lose a spell in PF2.
EDIT: Correction: The Fighter's Deisruptive Stance allows his AoOs to disrupt Concentrate and Manipulate actions on a hit (instead of only Manipulate and only on a crit).
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So it seems the only specific actions can "disrupt"...I would have thought they would have added a "disrupt" Trait but I guess it is only on a critical.
You lash out at a foe that leaves an opening. Make a melee Strike
against the triggering creature. If your attack is a critical hit and
the trigger was a manipulate action, you disrupt that action. This
Strike doesn’t count toward your multiple attack penalty, and
your multiple attack penalty doesn’t apply to this Strike.
I suppose normal AOO does not trigger on concentrate... hence why Disruptive Stance is need.
Also not all spells will trigger an AOO only if they have Material, Somantic or Focus traits....
• Material (manipulate)
• Somatic (manipulate)
• Verbal (concentrate)
• Focus (manipulate)
If the spell only has verbal like "Breath oF Life" it will not trigger and thus cannot be disrupted (accept using Disruptive Stance)
I think I understand it now :)
Yeah, I think I understand it me too! Thank you all!