Veteran of too many campaigns

You have seen it all, both great and terrible. You still feel fear, but have learned to control it. No matter what you face, you will serve as a beacon in the dark - a rock against which waves will crash:

• When 2 or more party members are within 10 feet of the player, another party member can use this character's armor class. This ability can be used only once per long rest.
• You have advantage on saves against  Cause Fear, Phantasmal Killer, Hypnotic Pattern, Tasha's Hideous Laughter, Crown of Madness.
• Must pass a Wisdom saving throw when disengaging.