Mystery Chests may land on any reel and reveal a random paying symbol. When one or more Mystery Chests land on a reel they lock and begin to clone themselves vertically on each spin until they cover the whole reel while revealing a new symbol on each spin. All Mystery Chests present on the slot reveal the same paying symbol type. Mystery Chests that have cloned themselves on a whole reel will unlock and leave the slot.

3 Free Spins scatters anywhere on the reels award 10 Free Spins. Mystery Chests stay locked for the duration of Free Spins even after they have covered a whole reel. If any Mystery Chests were locked when Free Spins is triggered they transfer into the bonus round and remain locked until the end of it. All Mystery Chests that have not covered an entire reel at the end of Free Spins will remain locked on the screen after the bonus round has ended. Free Spins scatters do not appear in Free Spins and thus no bonus spins will be awarded during the bonus round.