Carefree Swinemaster — ruling 1

While resolving Carefree Swinemaster's triggered ability, you can't pay the cost multiple times to create more than one token.

Carefree Swinemaster — ruling 2

You choose which player or planeswalker is being attacked by the Boar token as it enters the battlefield. It doesn't have to be the same player or planeswalker that Carefree Swinemaster is attacking.

Carefree Swinemaster — ruling 3

Although the token created is an attacking creature, it was never declared as an attacking creature. This means that abilities that trigger whenever a creature attacks won't trigger when it enters the battlefield attacking.

Carefree Swinemaster : règles, fonctionnement et interactions (MTG)

Carefree Swinemaster 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

Whenever this creature attacks, you may pay . If you do, create a 2/2 green Boar creature token that's tapped and attacking.

How it works : Carefree Swinemaster

Original English text — Wizards of the Coast / Scryfall

#1June 10, 2022· Wizards of the Coast
While resolving Carefree Swinemaster's triggered ability, you can't pay the cost multiple times to create more than one token.
No other card is named in this ruling.
#2June 10, 2022· Wizards of the Coast
You choose which player or planeswalker is being attacked by the Boar token as it enters the battlefield. It doesn't have to be the same player or planeswalker that Carefree Swinemaster is attacking.
Card named in this ruling
Boar
#3June 10, 2022· Wizards of the Coast
Although the token created is an attacking creature, it was never declared as an attacking creature. This means that abilities that trigger whenever a creature attacks won't trigger when it enters the battlefield attacking.
No other card is named in this ruling.