Ally Shield

An invisible barrier of magical force appears and protects you or an ally within range. Until the start of your next turn, the target creature has a +5 bonus to AC, including against the triggering attack, and takes no damage from magic missile.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional ally for each slot level above 2nd. The targets must be within 30 feet of each other when you target them.