Bellrick's Beast Slumber Nocturne

Each CR2 or lower Beast of your choice in a 15-foot-radius Sphere centered on a point within range must make a WIS saving throw at Disadvantagedisadvantage vs. a player Performance roll. If the Performance is superior, all beasts within the sphere will become  Incapacitated for 5 turns, at which point it must repeat the save. If the target fails the second save, the target has the Unconscious condition for the duration.  If the Beasts win the roll there is no effect  The spell ends on a target if it takes damage or someone within 5 feet of it takes an action to shake it out of the spell’s effect.

Creatures that have Immunity to the Exhaustion condition automatically succeed on saves against this spell.

To cast the spell: play the Nocturn on any non-percussion instrument, or use a charge Wand of Conducting, while walking 25 ft. directly toward the the center point of the spell.

After learning the song, the magical sheet of music disintegrates.  The song spell has 1 charge/day.