This is the SCATTER symbol.
An extra reel showing 5 random multiplier symbols, drops at every spin. All wins in the game are multiplied by the bottom most multiplier from this reel. After every tumble, the multipliers on this reel tumble down one position. Possible mutlipliers are: x1, x2, x3, x4, x5, x6, x8, x10, x12, x15, x20, x25, x50, x100, x250 or x500.
Hit 4, 5 or 6 SCATTER symbols to trigger the FREE SPINS feature and win 10, 12 or 14 free spins respectively. During the FREE SPINS round, the minimum multiplier possible on the MULTIPLIER REEL is x2. Hit 4, 5 or 6 SCATTER symbols during the round to retrigger the feature and win 5, 8 or 10 additional free spins. Special reels are in play during the feature.
The FREE SPINS ROUND can be instantly triggered from the base game by buying it for 100x current total bet. When buying the free spins round 4, 5 or 6 SCATTERS are guaranteed to hit randomly on the triggering spin.