Adeline, Resplendent Cathar

Mana cost: {1}{W}{W}
Type: Legendary Creature — Human Knight
Power / toughness: * / 4
Set: Innistrad: Midnight Hunt Promos #1s (rare)

Vigilance
Adeline's power is equal to the number of creatures you control.
Whenever you attack, for each opponent, create a 1/1 white Human creature token that's tapped and attacking that player or a planeswalker they control.

Adeline, Resplendent Cathar has 10 printings, first in Innistrad: Midnight Hunt (2021). EDHREC ranks it #491 among Commander cards. It appears most in Zurgo Stormrender decks (18,623 on EDHREC). 3 public decks on TCG run it. It has 5 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Adeline, Resplendent Cathar

Break the Chains, led by Caesar, Legion's Emperor
Cavalry Charge - March of the Machine Commander, led by Sidar Jabari of Zhalfir
Mardu Surge - Tarkir: Dragonstorm Commander, led by Zurgo Stormrender

Commanders that run Adeline, Resplendent Cathar most

Deck counts from EDHREC.

Zurgo Stormrender: 18,623 decks
Isshin, Two Heavens as One: 18,493 decks
Caesar, Legion's Emperor: 13,744 decks
Sidar Jabari of Zhalfir: 11,575 decks
Éowyn, Shieldmaiden: 8,590 decks
Marneus Calgar: 6,737 decks
Jetmir, Nexus of Revels: 5,577 decks
Raffine, Scheming Seer: 5,012 decks

Often played with Adeline, Resplendent Cathar

Cards that show up in the same decks on EDHREC.

Rulings

2021-09-24: Tokens will be created for each of your opponents, not just opponents that you attacked.
2021-09-24: The ability that defines Adeline's power works in all zones, not just the battlefield. As long as Adeline is on the battlefield (and still a creature), that ability will count Adeline itself.
2021-09-24: Although the Human tokens created by the triggered ability are attacking, they were never declared as attacking creatures (for the purposes of abilities that trigger whenever a creature attacks, for example).
2021-09-24: Attacking with any creatures will cause Adeline's last ability to trigger. Adeline doesn't have to be among them.
2021-09-24: You choose whether each token is attacking that opponent or a planeswalker they control as those tokens enter the battlefield.