The Knight King Slot by Pragmatic Play

Four character symbols - a bearded warrior, a red-haired archer, a noble swordswoman, and a fire-breathing dragon - sit on deep purple reels framed in ornate gold. A misty mountain backdrop with castle turrets and pine forests completes the medieval setting. A shield-shaped collection meter hangs on the left side of the grid, tracking progress toward the bonus.

The standout mechanic here is Special Money Symbols. On any base game spin, one of the pay symbols or the wild gets randomly selected and lands carrying money values between 0.5x and 20x the bet. Every instance of that symbol visible on the reels pays out its displayed value immediately, on top of any regular line wins. When the chosen symbol fills enough positions, payouts stack up fast.

Three or more scatters award 7 free spins. The bonus round picks one symbol as the "special" for the entire duration. Each winning combination increases that symbol's base value, so later spins pay progressively more than earlier ones. Retriggers add more spins to the count, giving the escalating value mechanic more room to build.

The buy bonus at 80x the bet skips straight to free spins. Without tumbles, cluster mechanics, or expanding grids, the game leans on its value-escalation system during the bonus round to push toward the 5,000x ceiling.