Cecil’s Flameguard

Flames burn brightly, exuding warmth and defiance. a blazing wall of radiant flames bursts forth from you, forming a protective rampart that shields your allies and scorches the unworthy. Choose any number of creatures within 20 feet of you. For the duration, chosen creatures are surrounded by flickering flames of golden light, granting them a +1 bonus to their AC, attack rolls, and saving throws. Any creature that enters the aura or starts its turn within the aura gains the benefits of the spell. A creature that leaves the aura loses the benefits. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the bonus increases by +1 per slot level above 3rd, to a maximum of +3. Additionally, the radius of the effect increases by 5 feet for each slot level above 3rd.