Teamwork Benefit: Invisibility Sweep
If one is aware of the presence of an unseen enemy, the team can quickly move through an area and pinpoint the foe's location.
Training
The team practices finding invisible enemies by swinging their weapons through empty spaces and making sudden movements than an invisible foe wouldn't anticipate. More importantly, the team quickly develops a shorthand way of describing the location of an unseen enemy any one has pinpointed. Eventually, members of the team can quickly and effectively target a specific (apparently empty) square based on a verbal description.
Task Leader Prerequisites
Blind-Fight.
Team Member Prerequisites
None.
Benefit
Each team member can check for the presence of an invisible enemy by groping into four adjacent 5-foot squares within reach, making touch attacks into those squares as described on page 295 of the Dungeon Master's Guide. Doing so is a standard action. If one team member pinpoints the location of an invisible enemy (whether through groping, Spot and Listen checks, or other means), every other team member within earshot also has that enemy pinpointed until that enemy moves into a different square. Pinpointed invisible enemies still gain the benefit of total concealment.
(All content on this page reproduced with apologies to Wizards of the Coast from DMG II)