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From Pathfinder Gamemastery Guide, which isn't enabled.

Perception Filter

ACTION
Activity 2 actions

Aspect mind

Activate envision
Frequency once per day

Effect Your relic reaches into the minds of nearby creatures and blocks your presence from their perceptions. For the next 10 minutes, a creature that enters a 120-foot emanation, centered on you, must attempt a secret Will save, after which the creature is then temporarily immune for 1 day.

Critical Success The creature is unaffected.

Success The creature takes a –2 status penalty to Perception checks to Seek or otherwise detect you.

Failure You filter all of the creature's senses, making it difficult for it to notice you. When you are Hidden or Undetected from the creature, it doesn't observe you as soon as you do anything other than Hide, Sneak, or Step. If it rolls a Perception check to Seek or otherwise detect you, it gets the outcome one degree of success worse than what it rolled, and if you roll a Stealth check to Hide, Sneak, or otherwise escape its attention, you get the outcome one degree of success better than what you rolled against the creature. If you use a hostile action toward the creature, the effect ends for that creature after your hostile action is completed.

Critical Failure As failure, but the effect doesn't end for that creature if you use a hostile action against it.

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