Battlefield Survey

Tactician Pursuit: 9th level You become a master at leading your allies around in a battlefield you have studied. When you spend 10 minutes observing an area that is within 120 feet from you, or by using a detailed map, select a number of creatures up to your Critical Analysis ability modifier. You and those selected allies ignore unenhanced difficult terrain, and have advantage on Dexterity (Stealth) checks in that area.

Granted by Tactician Pursuit at 9th level.