Wall of Shields

• When you are within 5 feet of a creature that has a shield , you can use your reaction to make a wall of shields. The involved creatures gain half cover, provided they are bearing shields.

Half Cover

• A target with half cover has a +2 bonus to AC and Dexterity saving throws. A target has half cover if an obstacle blocks at least half of its body. The obstacle might be a low wall, a large piece of furniture, a narrow tree trunk, or a creature, whether that creature is an enemy or a friend.