Accelerate

You accelerate a creatures ability to perceive the passage of time and act. Choose a willing creature within range. Until the spell ends, the target gains an additional bonus action on each of its turns. This bonus action may not be used to cast a spell if a target has already cast a spell as a bonus action that round.

Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd.