Zara, Renegade Recruiter

Mana cost: {3}{U}{R}
Type: Legendary Creature — Human Pirate
Power / toughness: 4 / 3
Set: Magic Online Promos #86264 (rare)

Flying
Whenever Zara attacks, look at defending player's hand. You may put a creature card from it onto the battlefield under your control tapped and attacking that player or a planeswalker they control. Return that creature to its owner's hand at the beginning of the next end step.

Zara, Renegade Recruiter has 5 printings, first in Commander Legends (2020). EDHREC ranks it #4,985 among Commander cards. It appears most in Admiral Brass, Unsinkable decks (5,858 on EDHREC). 1 public deck on TCG runs it. It has 5 official rulings.

Legality

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

Public decks that run Zara, Renegade Recruiter

Ahoy Mateys - The Lost Caverns of Ixalan Commander, led by Admiral Brass, Unsinkable

Commanders that run Zara, Renegade Recruiter most

Deck counts from EDHREC.

Admiral Brass, Unsinkable: 5,858 decks
Obeka, Brute Chronologist: 4,874 decks
Edward Kenway: 4,683 decks
Don Andres, the Renegade: 3,884 decks
Admiral Beckett Brass: 3,210 decks
Edea, Possessed Sorceress: 1,988 decks
Yasova Dragonclaw: 704 decks
Nathan Drake, Treasure Hunter: 305 decks

Often played with Zara, Renegade Recruiter

Cards that show up in the same decks on EDHREC.

Rulings

2020-11-10: Although the creature is attacking, it was never declared as an attacking creature. This means that abilities that trigger whenever a creature attacks won't trigger when the creature enters the battlefield attacking.
2020-11-10: If a creature is attacking a planeswalker, that planeswalker's controller is the defending player.
2020-11-10: The creature is returned to its owner's hand only if it's still on the battlefield as the delayed triggered ability resolves. If it's somewhere else at that time, it stays where it is.
2020-11-10: If you lose the game before the creature put onto the battlefield under your control returns to its owner's hand, that creature is exiled. If that creature's owner loses the game while you control the creature, the creature leaves the game with them.
2020-11-10: Any effects that say the creature can't attack affect only the declaration of attackers. They won't stop the creature from entering the battlefield attacking. For example, you could put a creature card with defender onto the battlefield tapped and attacking this way.