Legion Loyalty is a mythic Enchantment card from Battle for Baldur's Gate Promos (PCLB), collector number 31s. Current market price: — (foil $5.65), TCGplayer market prices via Scryfall.
Creatures you control have myriad. (Whenever a creature with myriad attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)