FAQ
What exactly is the main bonus feature in the Book of Oz slot?
The main feature is the Locking Reels and Expanding Symbol free spins. Get three Book scatters to activate it. You are given 6 spins, and one symbol is selected to expand and lock on its reel for the duration of the round. If more of that symbol lands, you get a re-spin. This can lock several reels, sometimes covering the full screen for a big payout. It’s a high-volatility feature and the game’s main source of big wins.