Battlecry Ballad A5E

You fill your allies with a thirst for glory and battle using your triumphant rallying cry. Expend and roll a Bardic Inspiration die to determine the number of rounds you can maintain concentration on this spell (minimum 1 round). Each target gains a bonus to attack and damage rolls equal to the number of rounds you have maintained concentration on this spell (maximum +4).

You cannot cast another spell through your spellcasting focus while concentrating on this spell.

You can maintain concentration on this spell for an additional round for each slot level above 3rd.