Respins
Any 3 Target symbols that land on the screen during a Free Spin will stick in place, and the reels will keep respinning in search of more Targets.
If you pray to the Mayan gods, you could find untold riches in the JACKPOT bonus game or catch the cascading gold coins and pray for the Inca stone warriors to fall in the Free Spins bonus game for those jaw dropping empirical wins!
And look out for Royal Letters, as opening these will award one of the four in-game modifiers.