Cheapest priced copy (March of the Machine Commander): $0.69 at Card Kingdom, near mint, their price list as of .
Silverwing Squadron 
Creature — Human Knight · */* · Rare · Phyrexia: All Will Be One Commander · #88
Flying, vigilance
Silverwing Squadron's power and toughness are each equal to the number of creatures you control.
Whenever this creature attacks, create a number of 2/2 white Knight creature tokens with vigilance equal to the number of opponents you have.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.69 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 315 | Rare | $0.79 | — |
| March of the Machine Commander | 207 | Rare | $0.69 | — |
| Phyrexia: All Will Be One Commander | 88 | Rare | $0.69 | — |
3 rulings from Wizards of the Coast
- 4 October 2019As long as Silverwing Squadron is on the battlefield, its ability will count itself, so it'll be at least 1/1.
- 4 October 2019In a multiplayer game, opponents who have left the game aren't counted by Silverwing Squadron's triggered ability.
- 4 October 2019The ability that defines Silverwing Squadron's power and toughness works in all zones, not just the battlefield.