Temple of Thunder II Bonus Buy Slot by Evoplay

Mystery symbols behave differently depending on when they land, and that split is the central design choice here. In the base game, mystery symbols reveal regular symbols, wilds, or coin symbols - creating a path into the Hold&Win bonus. During free spins, mystery symbols only reveal regular symbols and wilds, blocking the bonus trigger entirely. That separation forces players into distinct feature tracks rather than letting mechanics compound freely.

The Hold&Win bonus activates when five or more coin symbols appear on a single spin. Three respins start the sequence, and each new coin landing resets the counter back to three. Regular coins carry values of 1x, 2x, 3x, 5x, 9x, 20x, or 25x bet. Three special coin tiers sit above those: Mini at 10x, Minor at 50x, and Major at 500x. Filling all 15 grid positions awards the Epic Prize at 3,000x bet on top of all accumulated coin values.

Free spins trigger when three scatter symbols land on reels 2, 3, and 4 - ten spins per activation with retrigger potential for another ten. Since mystery symbols drop coins from the pool during this feature, the free spins focus purely on payline combinations with stacked wilds and high-paying symbols. Seven regular symbols cover a modest pay range from 0.4x to 15x for five of a kind.

The buy bonus menu offers two separate purchases: 10 free spins at 51x total bet or the Hold&Win bonus at 47x total bet. That second option skips the scatter requirement entirely and starts the bonus with five guaranteed coin symbols already on the grid, each carrying a random value.