Wings of the Phoenix is a fairly typical Konami game where you win by landing winning combinations on paylines. Where things get interesting is with the "Mystery Feature" which can be randomly triggered during or after any spin.
During the Mystery Feature, all non-premium symbols will be randomly transformed into the same premium symbol, including the wild symbol! The wild symbol is also Top Symbol and pays 4x the amount of the next best premium symbol, so it's all about the wild symbol in this game.
The Free Games Bonus is triggered by landing 3, 4, or 5 bonus symbols for 7, 15, or 30 games respectively. During the bonus, the Mystery Feature may occur more frequently, giving you a shot at that Big Win or Jackpot, Enjoy!