Undetected Rules
When you are undetected by a creature, that creature can't see you at all, has no idea what space you occupy, and can't target you, though you still can be affected by abilities that target an area. When you're undetected by a creature, that creature is to you.
A creature you're undetected by can guess which square you're in to try targeting you. It must pick a square and attempt an attack. This works like targeting a creature (requiring a ), but the flat check and attack roll are rolled in secret by the GM, who doesn't reveal whether the attack missed due to failing the flat check, failing the attack roll, or choosing the wrong square. They can to try to find you.
Source, license, and attribution
Source: Pathfinder Player Core (remaster-core-2026-08-10)
This product is licensed under the ORC License located at the Library of Congress at TX 9-307-067 and available online at various locations. All warranties are disclaimed as set forth therein. Attribution: Pathfinder Player Core (c) 2023, Paizo Inc.; Designers: Logan Bonner, Jason Bulmahn, Stephen Radney-MacFarland, and Mark Seifter. Authors: Alexander Augunas, Kate Baker, Logan Bonner, Jason Bulmahn, Carlos Cabrera, Calder CaDavid, James Case, Eleanor Ferron, Steven Hammond, Joan Hong, Vanessa Hoskins, James Jacobs, Jenny Jarzabski, Erik Keith, Dustin Knight, Lyz Liddell, Luis Loza, Patchen Mortimer, Dennis Muldoon, Stephen Radney-MacFarland, Mikhail Rekun, David N. Ross, Michael Sayre, Mark Seifter, Kendra Leigh Speedling, Mark Thompson, Clark Valentine, Andrew White, Landon Winkler, and Linda Zayas-Palmer. Adaptation: Myth Meister PF2e Remaster Compendium, 2026. If you use this Adapted Licensed Material, please credit Myth Meister. The normalized rules records and rules-reference text in the Myth Meister PF2e Remaster Compendium are Adapted Licensed Material offered under the ORC License. Reserved Material in this product includes the Myth Meister name and logos, application source code, visual design and trade dress, and original campaign content. Pathfinder, Paizo, product logos, artwork, maps, trade dress, setting lore, characters, deities, locations, organizations, events, plots, and other Paizo Reserved Material are not included. Myth Meister is not affiliated with or endorsed by Paizo Inc. Expressly Designated Licensed Material: None.