Animated Dancing Item

Bond of Animation. The maximum Hit Points of this creature are 10 + five times your Bard Level. Its Proficiency Bonus equals your bonus.

Immutable Form. The item is immune to any spell or effect that would alter its form.

Irrepressible Dance. When any creature starts its turn within 10 feet of the item, the item can increase or decrease (your choice) the walking speed of that creature by 10 feet until the end of the turn, provided the item isn’t incapacitated.

Force-Empowered Slam. Melee Weapon Attack: Your spell attack modifier in  this class to hit, reach 5 ft., one target you can see. Hit: (1d6 + 10 + PB) force damage.

In combat, the item shares your Initiative count, but it takes its turn immediately after yours. It can move and use its reaction on its own, but the only action it takes on its turn is the Dodge action, unless you take a bonus action on your turn to command it to take another action. That action can be one in its stat block or some other action. If you are incapacitated, the item can take any action of its choice, not just Dodge.