Power of Merlin Megaways

Tumbling mechanic (cascading): symbols fall down from up to bottom
Train reel tumbling moves from right to left
10 Regular symbols - 1 Wild symbol, doesn’t pay - 1 Scatter, doesn’t pay
4 or more symbols trigger Free Spins
1 special symbol (lightning bolt): doesn’t pay, triggers Lightning feature
1 Overlay symbol
The popular Tumble element - winning symbols disappearing from the reels and empty positions are replaced with new magical-themed symbols, until no more winning combinations are created

Free Spins

Land 4 or more Scatters and you’ll receive 10, 14, 18, 22, 26, or 30 free spins, If you land on 4, 5, 6, 7, 8, or 9 Scatters, respectively

Land on the Lightning Bolt and the game will select a random basic symbol, and then all the symbols of this type present will be replaced with a Wild symbol
Land courtesy of a Tumble, and this symbol will change to a new position on the top row, with symbols becoming Wilds