The Shifting Maze Avalanche feature is triggered when a win occurs with a highlighted symbol. This causes all symbols matching the highlighted symbol to turn into a path symbol. The reels with shift to the right with all regular symbols disappearing and new symbols falling on to the reels. Blocker symbols will also be removed to help you land wins more easily. You can also trigger features that will add more path symbols (Guidance of Athena) and trigger expanded wilds (Minotaur Feature). So long as you continue landing wins with path symbols, the Shifting Maze Avalanche will continue.