Book Of Darkness Slot Review
A crypt lit by teal crystals, two rivals circling one book, and a bonus round that makes you pick a side before you know how the fight will go. Book Of Darkness is a book slot that commits to its duel: the Huntress and the Dark Wizard aren’t just the top payers, they’re the mechanism the whole game turns on.
Betsoft runs it on a 5×4 grid with 10 fixed paylines, a 96.48% RTP and high volatility. Players who know the studio’s Book Of Helios or Alkemor’s Elements will recognise the atmospheric lean, though neither of those puts two heroes in a cage match over the outcome.
The Base Game and the Book
Wins pay left to right across the 10 paylines, with coinciding wins on different lines added together and only the highest combination counting per line. It’s a conventional setup. The 5×4 layout gives each symbol stack room to matter when the expanding mechanics kick in, and payouts update dynamically to match the selected bet.
The Book of Darkness symbol is both wild and scatter. As a wild it substitutes for every symbol except the Huntress and the Dark Wizard when their combination is triggering the Clash for Power. As a scatter it pays anywhere, and it carries the richest single payout on the reels at 20x the bet for five.
The Book can also pay as a line symbol in a continuous sequence on a payline, so it isn’t purely a feature trigger. Scatter wins sit on top of payline wins, so a Book line-up pays its instant award in addition to anything else the spin produces. It disappears entirely during the Clash for Power, Shadowform and Scatter Free Spins sequences, and it isn’t wild at any of those points either.
Paytable values are multiples of the total bet:
- Dark Wizard / Huntress: 1x for two, 2x for three, 10x for four, 25x for five
- Crystal / Ring: 0.2x for two, 1x for three, 5x for four, 15x for five
- Potion / Dagger: three pays 0.2x, four pays 3x, five pays 8x
- A / K / Q: from 0.2x for three up to 5x for five
The two heroes dominate the paytable, and the gap between them and the royals is wide. Five Dark Wizard or Huntress symbols at 25x the bet is a serious hit from a single line. That matters more than usual here, because the heroes are also the engine of the Clash for Power round.
Scatter Free Spins
Landing three, four or five Book of Darkness scatters awards an instant payout plus a round of free spins:
- 3 Books: 10 free spins plus 2x the bet
- 4 Books: 15 free spins and a 20x payout
- 5 Books: 20 free spins with 200x paid up front
Before the round begins, a special symbol is selected from everything except the Book. Whenever that symbol appears on three or more reels, it expands vertically to cover each of those reels entirely. Line wins are calculated first, then the expansion pays like the standard symbol, including on non-adjacent positions and across all paylines.
It’s the familiar expanding-symbol format, executed cleanly. The expansion happens after the payout of regular symbols, so both a line win and an expanded win can come from the same spin. Free spins are played at the lines and bet of the triggering spin, and the round does not retrigger.
The Clash for Power
This is the feature the game is built around. The trigger is specific: the Huntress, the Book and the Dark Wizard have to land in a consecutive straight line on the reels, in either order. When that happens, you choose a fighter to back in the battle.
The battle plays out across a free spins sequence. Both heroes expand on the reels during the fight, and each fills an individual Hero Meter with winning spins. The first hero to record three winning spins that include a win with their own symbol claims victory.
Expansion feeds the meter directly. When a hero’s symbol appears on three or more reels, it expands vertically over those reels and banks the corresponding points towards the three-win target. The chosen hero expands first, which gives them the edge if both fighters are one spot short with enough symbols to go.
If your pick loses, the round ends and the base game resumes with nothing extra. Free spins don’t retrigger during the sequence, and the Book doesn’t appear on the reels at all.
One rule worth knowing: when the conditions for Scatter Free Spins and the Clash for Power are met on the same spin, only the Clash triggers. And when both possible hero combinations land at once, the round still only fires once.
Shadowform
Win the Clash and your hero claims the book itself, unlocking Shadowform with 10 free spins. What those spins do depends entirely on who won the fight:
- Huntress wins: a 5x multiplier applies to wins featuring the Dark Wizard, Huntress, Crystal and Ring symbols
- Dark Wizard wins: the number of expanding symbols increases to five
The Dark Wizard’s version is the swingier of the two. Standard line wins are calculated, then five selected symbols expand one after another when present on three or more reels each. It’s the only point in the game where more than one symbol gets the expansion treatment at a time.
The Huntress’s multiplier is the steadier route, hitting the four most valuable symbols on the paytable, with the heroes already paying 25x for a full line before the boost lands. As with the Clash, the Book doesn’t appear during Shadowform, isn’t wild, and the round doesn’t retrigger.
Our Honest Verdict
Overall Rating: 7.7/10
This is a game you play for the duel. Most of a session sits in the base game watching the royals tick over, and then three symbols line up in a row, the crypt darkens, and suddenly you’ve got a fighter to defend. That structure, pick a hero, watch the meter fill, earn a Shadowform that changes shape depending on who survives, is the reason to be here at all.
The strength is that the choice is real. Backing the wizard for five expanding symbols or the huntress for a 5x multiplier on the four best payers is a genuine decision, made before a single spin resolves. The weakness is the trigger itself: the heroes have to land in an exact straight line, and a losing pick pays nothing for the trouble of getting there.
It’s one for players who enjoy the theatre a book slot can carry and have the patience for a long walk between duels. Anyone chasing frequent bonus rounds will find the crypt a quiet place. Those who stay get the better fight.
Book Of Darkness FAQs
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What is the RTP of Book Of Darkness?
Book Of Darkness runs at an RTP of 96.48%. -
Is Book Of Darkness high volatility?
Yes, Book Of Darkness is a high volatility slot, so wins tend to be less frequent but larger when they arrive. -
How many paylines does Book Of Darkness have?
Book Of Darkness has 10 fixed paylines, paying left to right across a 5×4 grid. -
How do you trigger the Clash for Power in Book Of Darkness?
Line up the Huntress, the Book and the Dark Wizard in a consecutive straight line, in either order. You’ll then get to pick which of the two heroes to back in the battle. -
What is Shadowform in Book Of Darkness?
Shadowform is the final bonus round, awarded when your chosen hero wins the Clash for Power. It gives 10 free spins: a 5x multiplier on hero, Crystal and Ring wins if the Huntress wins, or five expanding symbols if the Dark Wizard wins. -
How does the expanding symbol work in Book Of Darkness free spins?
Before Scatter Free Spins begin, one symbol is selected. Whenever it appears on three or more reels, it expands to cover those reels fully and pays on all paylines, including non-adjacent positions. -
Can free spins retrigger in Book Of Darkness?
No. Free spins do not retrigger during Scatter Free Spins, the Clash for Power or Shadowform. -
Who makes Book Of Darkness?
Book Of Darkness is made by Betsoft.
