Mermaid's Diamond takes players on an enchanting underwater adventure with its unique 5-reel setup offering 720 ways to win. The reels are arranged in a 3-4-5-4-3 diamond shape, creating an immersive aquatic environment with mermaids, octopi, and treasure chests. Trident wilds can randomly appear on reels, turning up to two reels entirely wild during any spin. Landing five treasure chest scatters triggers the Free Spins feature, where players choose from five chests to reveal 10, 15, or 25 free spins, with the chance to summon more wilds.