Thunderbird Spirit might give you a subtle clue to the theme in action here, but the reality of the game is a little harder to figure out. Maybe this one doesn’t matter though, and the gameplay itself is the most important thing to be aware of.
You will see four rows on each of five reels, and you get a massive 100 paylines in play, which explains the increase in rows. The scatter is a bird that looks a little like an eagle, and they pay in any combination of positions for three or more. The wild, meanwhile, is that very word placed over a dream catcher, depicted in lovely shades of blue. You won’t feel blue if it helps you towards a win though, as it replaces all other symbols apart from the scatter.
Three or more scatters will reward you with 10 free games, during which you can enjoy a locked wild feature. While you can’t trigger more free spins to occur, you can see wilds showing up. When they do, they lock into place and remain there for the duration of the free spins you have left. Any additional wilds appearing also lock into place, which means the odds of winning more prizes will likely increase the longer you play for!