Ranger Utility 2Crucial Advice
You are wise in all things. The sooner your friends realize this, the safer and better off they’ll be.
Immediate Reaction Ranged 5
Trigger: An ally within range that you can see or hear makes a skill check using a skill in which you’re trained
Effect: Grant the ally the ability to reroll the skill check, with a power bonus equal to your Wisdom modifier.
Published in Player's Handbook, page(s) 106.