Black Mamba is fully packed of features in the base game to help us clear the grid. On every non winning spin we have a chance of triggering the solo feature of the currently active band member. If you get at least 4 winning lines with the band members you trigger the concert feature that gives you each of the band members solo feature one after the other.
When we clear the grid and get into the free spin mode the current multiplier carries over into the free spin games, after each free spin the multiplier is reset to that value. Wilds will disappear if they don’t connect with any winning lines, making it easier to clear the grid.
The Singer, Martina, has her solo feature empowered in the free spin mode, triggering on every spin!