Lord Merlin and The Lady of The Lake is a 5-reel, 3-row video slot game with 10 paylines. 3 or more SCATTER symbols trigger the FREE SPINS mode with an initial 8 spins. A random ROYAL symbol or HIGH-PAYING symbol will be chosen on each spin to become a special EXPANDING SYMBOL! The chosen EXPANDING SYMBOL can form winning combinations across non-adjacent reels. If the High-Paying Symbol is selected as a special EXPANDING SYMBOL at least 2 of that symbol lands on the reels, that symbol will expand, and if Royal Symbol is selected as a special EXPANDING SYMBOL at least 3 of that symbol lands on the reels, that symbol will expand. During the FREE SPINS, the SCATTER symbol will change into the WILD SCATTER symbol. The WILD SCATTER acts like a WILD symbol, and substitutes for all symbols. In FREE SPINS, 2 or more WILD SCATTERS trigger the EXCALIBUR SPINS. Each WILD SCATTER symbol awards +1 EXCALIBUR SPIN. The chosen special EXPANDING SYMBOL locks in and can expand on all EXCALIBUR SPINS. 2 or more WILD SCATTERS re-triggers the feature. The game also features an optional Gamble round that provides an opportunity to multiply the total prize on any spin in the main game by correctly guessing the colour or suit of a hidden card. The Gamble round can be played up to five times in a row. You can attempt to multiply your prize in the optional Gamble round. Press the GAMBLE button after winning a prize to start the round. Your objective is to correctly guess the colour or suit of a face-down card. Take your guess by clicking the appropriate button. If you correctly predict the colour, you double your prize. If you correctly predict the suit, you quadruple your prize. You can play the Gamble round up to five times in succession and up to a limit of 2500 coins.