In the world of online slots, only one developer can be called the king when it comes to Arthurian slots. Play’n GO has taken upon itself the challenging task of retelling the Arthurian legend with a series of slots that may or may not be linked to each other. The latest among them is Merlin: Journey of Flame, a ten-payline, highly volatile title that looks quite classic at first glance. But, as is often the case with Play’n GO, you’ll discover many surprises as you start spinning.

The slot features a Book of… mechanic, but now in another familiar setting. It’s not an Egypt-themed slot like most, but that doesn’t make it any less exciting. As a matter of fact, the mechanic may even work better on the knights' table. There aren’t that many features, but you do get a wild/scatter book and an extra 6^th reel in the bonus round with an expander.

If you loved other Book of… slots but were in for a new twist, Merlin: Journey of Flame is worth a few spins at top casinos.

The Arthurian slot has a 5x3 setup with excellent graphics and animations. It looks a bit like a fantasy/magical slot game which isn’t surprising considering the character it’s based on. The layout and design are undoubtedly Play’n GO in style, with the familiar bet selector tool beneath the reels. In terms of symbols, you get magical gems and stones and a flaming cracked egg that looks set to give birth to a dragon.

If you want a preview of all the features, you can easily take a look at the paytable and guide with a single click. The slot’s great soundtrack and audio effects will put you in the right adventurous mood, completing the pretty picture.

Merlin: Journey of Flame is available on a wide range of mobile platforms. It works like a charm on Android and iOS devices and doesn’t need any casino mobile apps to work. Simply open it from a mobile browser and have a go at the round table.

Before you embark on the journey of the flame, you need to place a bet. Typically for a Play’n GO slot game, you can choose bets from $0.10 to $100 per spin. The slot is very easy to play, with the base game lacking any special features – they come later in the bonus round.

As for the base game, you still have a lot to look forward to. The premium symbols pay up to 500x for five of a kind which is more than what other Arthurian slots offer. When that 6^th reel kicks in, six-on-a-line wins pay up to 750x, which is even better, but only in the bonus round. Dragon egg wilds can step in to complete or improve wins while also serving the role of a scatter. In essence, these cracked flaming eggs substitute the famed book.

As a Book of… slot, the main highlight comes in the bonus round. While it still focuses on an expanding symbol, you have another twist to the good ol’ formula you won’t see coming.

Three, four, or five scatters deliver eight free games and pay 2x, 20x, and 200x, respectively. This is where the slot’s winning potential kicks in, thanks to the now-active 6^th reel. This means you can land wins involving six symbols, with a randomly chosen expander selected before the bonus starts.

Whenever the chosen symbol lands, it extends over a reel to give you a better winning potential. There’s no special spot where they can land, so you can expect full reel wins. The bonus round can be retriggered like you originally triggered it. There’s no cap on the free spins; you get eight free games with each retrigger.

The Merlin: Journey of Flame slot RTP is set to 96.28%. That’s excellent for a highly volatile slot with a Book of… math model, which can pay up to 3,750x the bet.

We have another Arthurian hit by Play’n GO, and it seems like another hit. It has surprisingly great features that kick-in in the bonus round while also featuring the famed expanding symbol that’s chosen randomly. You won’t get another one like on other online slots for cash of its ilk, but the sixth reel will more than makeup for the lack of it. It’s a Book of… slot with a twist you’d like and a great trip back to the times of King Arthur.