Their Number Is Legion is a rare Sorcery card from Warhammer 40,000 Commander (40K), collector number 63★. Current market price: — (foil $6.51), TCGplayer market prices via Scryfall.
Create X tapped 2/2 black Necron Warrior artifact creature tokens, then you gain life equal to the number of artifacts you control. Exile Their Number Is Legion. You may cast this card from your graveyard.