Cheapest priced copy (Core Set 2020): $0.59 at Card Kingdom, near mint, their price list as of .
Skyknight Vanguard 
Creature — Human Knight · 1/2 · Uncommon · Core Set 2020 · #218
Flying
Whenever this creature attacks, create a 1/1 white Soldier creature token that's tapped and attacking.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.59 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 218 | Uncommon | $0.59 | $3.99 |
| The List | M20-218 | Uncommon | $0.79 | — |
2 rulings from Wizards of the Coast
- 12 July 2019You choose which player or planeswalker the token is attacking. It doesn’t have to be attacking the same player or planeswalker that Skyknight Vanguard is attacking.
- 12 July 2019Although the token 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 the token enters the battlefield attacking.