You share your resistance with your allies.

Daily   ✦     Arcane
Minor Action      Close burst 5

Target: You and each ally in the burst

Effect: Choose a damage type: acid, cold, fire, force, lightning, necrotic, poison, psychic, radiant, or thunder. Each target gains resist 5 to that damage type until the end of the encounter.

Published in Player's Handbook 2, page(s) 144.