Wondrous Item, uncommon (requires attunement)
The banner of a mercenary company long forgotten. They're heroism is still in bolden upon the banner that they wore proudly. It echoes with their cheers of victory, and their roars of fury.
While wearing the banner, allies within 30 ft. Have a +1 on all saving throws.
Additionally, you can use your reaction to give one of those allies within 30 ft. An extra bonus to their saving throws equal to your proficiency bonus. You can only do this before the result of the roll is known.
This ability recharges after a short rest.