Mystery symbols landing on any reel awards a series of re-spins which continue as long as at least 1 mystery symbol is present on the reels. In each spin, all mystery symbols will convert into the same symbol, and thereafter move one reel to the left, until they leave the game area through the first reel.
8 free spins are awarded when 3 Scatter symbols land anywhere on the reel, +1 spin is awarded for each additional scatter.
Mystery symbols landing during free spins have the additional benefit of expanding to fill the whole reel, resulting in more of the same symbol being revealed and creating additional ways to win! The expansion of the mystery symbol can be upgraded to reveal even more symbols!
A treasure chest symbol is present on reel 5, and collected when landing. Every 3 chests collected upgrade the mystery symbol expansion to reveal 1 more symbol, up to a maximum of 6 symbols, creating a potential of 7776 ways to win! Each time the mystery symbol expansion is upgraded, 1 additional free spin is awarded.