Falcon, Winged Wonder 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

Flying Avian Telepathy — When Falcon enters, create Redwing, a legendary 1/1 blue Bird Scout creature token with flying and "Whenever Redwing attacks, surveil 1." (Look at the top card of your library. You may put it into your graveyard.)

Complete guide

Falcon, Winged Wonder takes to the skies to provide both aerial pressure and tactical card selection. This legendary hero doesn't fight alone, as he brings his loyal companion Redwing to the battlefield to help scout out your future draws. Understanding how these two interact with your library is key to mastering the Avian Telepathy ability.

A Dynamic Duo

Falcon, Winged Wonder is a 4/4 flyer for five mana that features the Avian Telepathy ability. When he enters the battlefield, you create Redwing, a legendary 1/1 blue Bird Scout creature token. While Falcon provides the muscle, Redwing provides utility by allowing you to surveil 1 whenever it attacks, letting you curate your library throughout the game.

How Avian Telepathy Resolves

When Falcon, Winged Wonder successfully enters the battlefield, his triggered ability goes on the stack. Once it resolves, you place the legendary Redwing token onto the battlefield. Because Redwing is legendary, you generally cannot have two of them at once. If you create a second Redwing, you will have to choose one to keep and put the other into your graveyard due to state-based actions.

Mastering the Surveil

A common mistake is forgetting that Redwing's ability triggers when it attacks, not when it deals combat damage. This means you get to look at the top card of your library before blockers are even declared. You can decide to leave the card on top if you need it next turn, or put it into your graveyard to fuel graveyard synergies or simply dig for a better answer.

Strategic Timing

You should play Falcon when you are ready to pivot to an aggressive air game. Since Falcon and Redwing both have flying, they can bypass ground blockers. If you have ways to flicker or blink Falcon, you can repeatedly trigger his entry ability to replace Redwing if the token was previously destroyed by your opponent.

Interaction examples

Doubling the Scouts

Roaming Throne

If you control Roaming Throne and chose 'Human', Falcon's Avian Telepathy ability triggers twice. You will create a Redwing token, and then create a second one. Because they are both legendary and have the same name, the 'legend rule' applies, and you must choose one to remain on the battlefield while the other is put into the graveyard.

Optimizing Your Next Draw

Redwing

Solemn Simulacrum

When Redwing attacks, its surveil 1 ability triggers. You look at the top card and see a land you don't need because you already fetched one with Solemn Simulacrum. You choose to put that land into the graveyard, increasing your chances of drawing a non-land spell during your next draw step.

Guide written with AI from the official text and rulings. Official English text prevails.