You can help your allies to better hide themselves in preparation for making a surprise attack.
Benefit: As a full-round action, you may help an adjacent ally to conceal himself advantageously. The ally uses your Stealth check rather than his own, for as long as the ally remains where you placed him and takes no actions.
Adventurer’s Handbook: Genius Guide Volume 1. Copyright 2010, Super Genius Games. Authors: Owen K.C. Stephens and Stan!