Frightening Frankie

Landing one or more Lightning symbols triggers Lightning bonus game with 2-6 free spins, removing one lowest paying symbol for each Lightning symbol that hit. Each time another Lightning symbol lands, the feature is retriggered with an additional 2-6 free spins, and another symbol is removed until up to five are gone. Hitting three or more scatters during the Lightning feature triggers Monster Trail free spins, where a 2x multiplier applies to all wins. Any remaining free spins from the Lightning bonus are transferred to the new bonus game on top of 10-20 free spins. During Monster Trail, test tube symbols are collected in a meter. If seven test tubes hit, the round is retriggered with 10 additional free spins and a random multiplier up to 10x.