Golden Grimoire sends chills down your spine from the first moment that it launches on your chosen device. Dramatic orchestral music rises and falls as the wind blows through the sorcerer's tower that provides the setting for the game. Your eyes are drawn to the enormous circular window at the back of the room which looks up into the star-filled sky, and you get the feeling that it could well be a secret portal to another dimension for anyone with the skill to open it.

In the foreground, there are tables laden with potion bottles and ancient spell books, with glow eerily by candlelight. There are also spells and inscriptions written on the walls of the chamber in a mysterious language.

The Golden Grimoire reel set sits in the centre of the screen, and it's made up of five reels and four rows of symbols and offers you forty fixed paylines.

If you're playing Golden Grimoire on a mobile device, the NetEnt Touch software makes it easy to change the bet level and coin value to determine your bet-per-spin, and you can even swap the Spin button to allow for left-handed play.

The spooky skull acts as the wild symbol in the Golden Grimoire slot, and it can help you create wins more easily and more frequently by replacing any symbol except the scatter. However, you'll only find it in the Free Spins Bonus and not the base game.

It takes just three scatters anywhere on the reels to unlock the Free Spins Bonus in Golden Grimoire, in which you get eight free games and sticky Mystery Symbols as well as the wild symbol.

The Mystery Symbols Feature makes the Golden Grimoire slot game quite unique as well as thrilling to play. You'll find it in the base game and the Free Spins Bonus, and it can transform standard symbols on the reels into matching symbols. To activate the feature, the Spell Book must be in view, and once it's present, it turns into a random paytable symbol. If it lands on Reels 2, 3, 4 or 5, and matches the symbol on the same row of Reel 1, all symbols that lie between those reels become matching symbols.