21+3 Progressive Blackjack is a card game that merges classic Blackjack strategies with engaging poker elements. Players are invited to place a side bet, using their initial two cards and the dealer's upcard to form a unique three-card poker hand. This innovative feature allows for combinations such as Flush, Straight, or Three of a Kind, adding layers of excitement and offering opportunities for substantial progressive jackpots. With an impressive RTP of 99.66%, the game provides a rewarding experience that blends skillful strategy with the thrill of chance, inviting players to aim for significant payouts through this captivating gameplay.