Ballad of the Bards

By starting an intense musical ballad, you are able to enhance allies nearby. When you cast this spell, choose any number of creatures within 30 feet of you. Creatures affected by the spell have their speed increased by 10, and either their AC increases by 1 or they gain a +2 bonus to attack rolls(Caster chooses during their turn).

During each of your turns while concentrating on this spell, you must use your bonus action to maintain the spell's effect. If you do not use your bonus action to do this, the spell is lost.

At Higher Levels. When you cast this spell using a 7th level spell slot or higher, for every 2 spell levels above 5th increase the speed by 5, AC by 1 or bonus to attack rolls by +1.