How does tripping work?

[ChallengeAccepted]

I have an encounter for me next session, and would like to get this cleared up before they fight this a creature. I have them fighting the creature linked below. He has chains for arms that have "and trip" attached to his attacks. My question is does the creature have to sacrifice damage on a hit to trip or is to just tacked onto whenever they hit?

https://www.d20pfsrd.com/bestiary/monster-listings/outsiders/inevitable/ine vitable-zelekhut

[Edge93]

First off this is the PF2 Playtest forum, I believe your qeustion is a PF1 question. But to answer said question, if I recall correctly if they hit with an attack that has that then they can make a free trip attempt with the same bonuses and penalties that were applied to the accuracy of the triggering attack.

[Claxon]

In the case of this monster, it deals the trip in addition to the damage.

However, please note this is not always the case for all monsters, and especially not the case for PCs.

[Sam Phelan]

Moved to Pathfinder first edition forum.

[blahpers]

It works very well, thank you.