The Mega Mask feature can activate at any time, merging 2 or more reels and bringing a minimum of 1 Mega Symbol. 3 Bonus Symbols on reels 1, 3, or 5 take you to Free Spins, giving you 10 free spins to start. Here, fireflies light up the reels and clear artifacts on the vines. Once 5 have been cleared, the 2 adjacent reels will merge and award 2 extra free spins!
Just beside the game is a glowing Mega Bet stone which allows you to increase the frequency of the Mega Mask Symbol feature that could lead to removing 5 or 9 artifacts before the Free Spins round begins.