The Expanding Wild Free Spins feature in Book of Oz works in two stages. First, you trigger the feature by landing 3, 4 or 5 Book symbols anywhere on the reels simultaneously — 3 Books gives 10 free spins, 4 gives 15, and 5 gives 20. Before the free spins begin, the Book opens and randomly selects one symbol to become the Special Expanding Wild for the entire round — this could be the Wizard, Lion, Butterfly, Potion, Gem, or a card symbol. During the free spins, every time that selected symbol appears anywhere on a reel it expands to fill the entire reel (all 3 positions), creating full-reel wild substitutions across the active paylines. The expansion happens regardless of the symbol’s original position on the reel. If the expanding symbol appears on multiple reels in the same spin, all of those reels expand simultaneously — up to all 5 reels filling with the same expanded symbol, which at the Wizard level creates a 500× bet win. Landing 3+ Books during free spins retriggered 10 more free spins with the same expanding symbol continuing.

The minimum bet in Book of Oz at Casino Classic NZ is NZ$0.10 per spin — the lowest minimum of any featured slot in the Casino Classic library. This is achieved by setting 1 coin per payline at the minimum coin value across 10 active paylines. At NZ$0.10/spin, all features are fully available including the Expanding Wild Free Spins and retrigger. The maximum bet is NZ$20/spin. Unlike Casino Classic’s 243-ways slots (Immortal Romance, Thunderstruck II), Book of Oz uses a traditional 10-payline structure — you can technically reduce the number of active paylines below 10 to lower your total bet per spin, but playing all 10 is strongly recommended as reducing paylines significantly cuts your win frequency and makes the expanding wild feature less profitable per trigger.

The maximum win in Book of Oz is 500× your total bet per spin, achieved during the Expanding Wild Free Spins feature when the Wizard is selected as the expanding symbol and fills all 5 reels simultaneously. With all 10 paylines active at NZ$1.00/spin, this produces a NZ$500 win from a single free spin. At NZ$2.00/spin the same event yields NZ$1,000; at the NZ$20 maximum bet, it produces NZ$10,000 from one spin. The 500× cap is a fixed upper limit set by Microgaming — unlike Immortal Romance or the jackpot slots, there is no mechanism for wins beyond 500× in a single spin. This makes Book of Oz the most predictable high-volatility slot in the Casino Classic library: you know exactly what the ceiling is, which helps with session planning. Note that the 500× ceiling applies per spin — multiple free spins in a round, especially across retriggered sessions, can each independently approach 500× if the Wizard keeps expanding.

Yes — Book of Oz is fully available on mobile at Casino Classic NZ with no download or app required. Open Safari on iPhone or Chrome on Android, navigate to Casino Classic NZ, log in, and find Book of Oz in the slots lobby. The full game renders on any screen size with touch-optimised controls: tap to spin, tap the bet level controls to adjust your stake, and swipe to browse the paytable. The Expanding Wild Free Spins animation — including the Book opening to reveal the selected symbol and the reel expansion sequence — runs identically on mobile. Casino Classic loads Book of Oz in under 3 seconds on standard NZ 4G. At NZ$0.10/spin minimum, it’s also one of the most accessible mobile slot options at Casino Classic for longer sessions. Add Casino Classic to your iPhone home screen (Safari Share → Add to Home Screen) for one-tap access.

Book of Oz is Microgaming’s take on the “Book” slot format originally popularised by Novomatic’s Book of Ra and greatly expanded by Play’n GO’s Book of Dead. All three share the same core mechanic: a symbol that is both Wild and Scatter, and a free spins feature where a randomly selected symbol expands to fill entire reels. Book of Oz differentiates itself through its Oz fantasy theme (rather than traditional Egyptian mythology), a more sophisticated Microgaming audio-visual presentation, and Microgaming’s certified 96.50% RTP — which is competitive within the genre. Compared to Book of Dead (Play’n GO, 96.21% RTP), Book of Oz has meaningfully higher long-term return. At Casino Classic NZ, Book of Oz is the only “Book” format slot available, making it the default choice for NZ players who love the expanding wild mechanic. Its 500× maximum win, 10-payline structure, and NZ$0.10 minimum make it a distinctive and accessible choice within the Casino Classic library.

Book of Oz is an excellent slot for new NZ players at Casino Classic for several reasons. First, its NZ$0.10 minimum bet is the lowest available, making it the most bankroll-friendly featured slot. Second, its 10-payline structure is simpler to understand than the 243-ways system used by Immortal Romance and Thunderstruck II — wins are clearly displayed by payline, which new players find more intuitive. Third, its core mechanic is straightforward: get 3+ Books, watch the Book reveal a symbol, spin free spins while that symbol expands. There’s one main feature rather than four character modes or a jackpot wheel — easier to follow during your first sessions. Fourth, at 96.50% RTP it delivers strong long-term value. The caveat for new players is high volatility — base-game wins are infrequent and the game is designed to pay during free spins. New players should set a session budget before playing and understand that dry spells between free spins triggers are normal and expected.