Theodore’s Phantom Bandmates (HB)

You summon 1-5 illusionary musicians, that can play any instrument of your choice and can look like any humanoid race of your choice and have any appearance of your choice, the illusions are harmless and obviously illusions, but can produce sound and move in a lifelike manner, playing along or singing with you or for you. The illusions take the help action to give you Advantage on Performance checks related to singing, playing an instrument or dancing. They can either stay where cast or follow you, though they have to stay within 30ft. The spell can be ended at will, requiring no action

At Higher Levels: If you cast the spell using a spell slot of 2nd or higher, the duration of the spell is increased by 1 hour per level above 1st

“The strange Half-elf smiled at the bored crowd of the tavern, and then he blew a weird series of notes on his flute. the air shimmered around him as he did, creating images of even stranger people, looked like fey I think. Soon the tune of six instruments flowed through that hall, and even the old crone that owns the placed danced around like she was 20“

Maxuel Dolan (witness to Theodore's first appearance in the prime material plane)