Firbolg Flutist — ruling 1

Firbolg Flutist's triggered ability can target any creature you don't control, even one that is untapped.

Firbolg Flutist — ruling 2

Gaining control of a creature doesn't cause you to gain control of any Auras or Equipment attached to it.

Firbolg Flutist — ruling 3

The term “defending player” in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking or the controller of the planeswalker it was attacking at the time the ability resolves. If that creature is no longer attacking, it refers to the player it was last attacking or the controller of the planeswalker it was last attacking.

Firbolg Flutist — ruling 4

If the defending player is your only opponent, no tokens are put onto the battlefield.

Firbolg Flutist — ruling 5

You choose whether each token is attacking the player or a planeswalker they control as the token is created. If it’s attacking a planeswalker, you choose which one.

Firbolg Flutist — ruling 6

Although the tokens enter the battlefield attacking, they were never declared as attackers. Abilities that trigger whenever a creature attacks won’t trigger, including the myriad ability of the tokens. If there are any costs to have a creature attack, those costs won’t apply to the tokens.

Firbolg Flutist — ruling 7

The tokens all enter the battlefield at the same time.

Firbolg Flutist — ruling 8

Each token copies exactly what was printed on the original creature and nothing else. It doesn’t copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.

Firbolg Flutist : règles, fonctionnement et interactions (MTG)

Firbolg Flutist is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Enthralling Performance — When this creature enters, gain control of target creature you don't control until end of turn. Untap it. It gains haste and myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

How it works : Firbolg Flutist

Original English text — Wizards of the Coast / Scryfall

#1June 10, 2022· Wizards of the Coast
Firbolg Flutist's triggered ability can target any creature you don't control, even one that is untapped.
No other card is named in this ruling.
#2June 10, 2022· Wizards of the Coast
Gaining control of a creature doesn't cause you to gain control of any Auras or Equipment attached to it.
No other card is named in this ruling.
#3June 10, 2022· Wizards of the Coast
The term “defending player” in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking or the controller of the planeswalker it was attacking at the time the ability resolves. If that creature is no longer attacking, it refers to the player it was last attacking or the controller of the planeswalker it was last attacking.
No other card is named in this ruling.
#4June 10, 2022· Wizards of the Coast
If the defending player is your only opponent, no tokens are put onto the battlefield.
No other card is named in this ruling.
#5June 10, 2022· Wizards of the Coast
You choose whether each token is attacking the player or a planeswalker they control as the token is created. If it’s attacking a planeswalker, you choose which one.
No other card is named in this ruling.
#6June 10, 2022· Wizards of the Coast
Although the tokens enter the battlefield attacking, they were never declared as attackers. Abilities that trigger whenever a creature attacks won’t trigger, including the myriad ability of the tokens. If there are any costs to have a creature attack, those costs won’t apply to the tokens.
No other card is named in this ruling.
#7June 10, 2022· Wizards of the Coast
The tokens all enter the battlefield at the same time.
No other card is named in this ruling.
#8June 10, 2022· Wizards of the Coast
Each token copies exactly what was printed on the original creature and nothing else. It doesn’t copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.
Card named in this ruling
Copy
#9June 10, 2022· Wizards of the Coast
Any enters-the-battlefield abilities of the copied creature will trigger when the tokens enter the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the copied creature will also work.
No other card is named in this ruling.
#10June 10, 2022· Wizards of the Coast
If myriad creates more than one token for any given player (due to an effect such as the one Doubling Season creates), you may choose separately for each token whether it’s attacking the player or a planeswalker they control.
No other card is named in this ruling.