Cheapest priced copy (Bloomburrow Commander): $0.39 at Card Kingdom, near mint, their price list as of .
Baird, Steward of Argive 
Legendary Creature — Human Soldier · 2/4 · Uncommon · Dominaria · #4
Vigilance
Creatures can't attack you or planeswalkers you control unless their controller pays {1} for each of those creatures.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.39 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 135 | Uncommon | $0.39 | — |
| Commander Masters | 15 | Uncommon | $0.39 | $0.79 |
| Dominaria | 4 | Uncommon | $0.39 | $0.79 |
| Dominaria Promos | 4s | Uncommon | — | $1.99 |
| The List | DOM-4 | Uncommon | $0.39 | — |
2 rulings from Wizards of the Coast
- 27 April 2018In a Two-Headed Giant game, creatures can attack your teammate and planeswalkers your teammate controls without requiring a mana payment. This is a change from previous rules.
- 28 July 2023If you control Baird, your opponents can choose not to pay to attack with a creature that attacks "if able." If there's no other player, planeswalker, or battle to attack, that creature simply doesn't attack.