Knights' Charge is a rare Enchantment card from Throne of Eldraine (ELD), collector number 328. Current market price: $0.65, TCGplayer market prices via Scryfall.
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.