Cheapest priced copy (March of the Machine Commander): $1.49 at Card Kingdom, near mint, their price list as of .
Knights' Charge 
Enchantment · Rare · March of the Machine Commander · #333
Whenever a Knight you control attacks, each opponent loses 1 life and you gain 1 life.
{6}{W}{B}, Sacrifice this enchantment: Return all Knight creature cards from your graveyard to the battlefield.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $1.49 to $2.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 328 | Rare | $2.29 | — |
| March of the Machine Commander | 333 | Rare | $1.49 | — |
One ruling from Wizards of the Coast
- 4 October 2019In a Two-Headed Giant game, Knights' Charge's first ability causes the opposing team to lose 1 life twice, and you gain 1 life once.