I have heard of two versions of this side bet, as follows: Note: Blazing 7's is trademarked by Bally Gaming. Pays start with just one seven in the first two cards and go up to a progressive jackpot for three suited sevens or three sevens in diamonds, depending on the version. Rummy (Blackjack variant popular in Costa Rica)īlazing 7's™ is a blackjack side bet that pays based on the number of sevens in the player's first three cards.