3x5 reels, 10 line slot. Normal Free Games is triggered by 3 or more scattered Book symbols. During Free Games a symbol is chosen at random to be the special symbol - this symbol will be on all lines in any position during the free games. Any normal spin can randomly trigger Night Mode. Each Night Mode Spin is free. The game will stay in Night Mode for at least 3 spins unless the Free Games is triggered. Night Mode Free Games are triggered by 2 or more scattered Books. During Night Mode Free Games, 2 scattered Books triggers more free games. 

Book of Kings 2