The Big Stack Lumberjack slot comes with 5 bonus features. Tree symbols can come with multipliers up to 100x and the Timberfall feature sees chopped trees covers positions to the left of the right for more wins. When the Eternal Oak grows fully, Axe symbols appear which can trigger the Ultimate Lumberjack Spins where you play with higher multiplier increases and more Timberfalls. In the Lumberjack Spins feature, you choose from higher multiplier increases with fewer Timberfalls or smaller multiplier increases with more Timberfalls.
Tree Multipliers + Timberfall
As mentioned above, all tree symbols cover 3 vertical positions on the reels. Each full tree symbol land can award a symbol multiplier of up to 100x.
There is a Timberfall feature which can be triggered if a full tree symbol is chopped down. This ensures the tree covers positions from its bottom position all the way to the left or right side of the grid.
Eternal Oak

Big Stack Lumberjack comes with an Eternal Oak which grows over time with each spin in the background. When the majestic Eternal Oak is fully grown, Axe symbols are added to the reels. Axe symbols can then trigger the Ultimate Lumberjack Spins feature.
With the Ultimate Lumberjack Spins feature, 7 free spins are awarded. Symbol multipliers increase with a value of 5, 10, 15, 20, 50 or 100 as well as a higher chance of the Timberfall feature.
Once this feature has taken place, the Eternal Oak is reset to a random growth state with Axe symbols removed from the reels. This feature only takes place in the base game and has a RTP rate of 96.56%.
Lumberjack Spins

When 3 or more Bonus Wild symbols appear anywhere on the reels during a base game spin, you’ll trigger the Lumberjack Spins feature. You then have 2 choices:

With the Win Big often, multipliers increase by 10 each time whilst its they increase by 1 with the Win Often option. In both modes, the Bonus Wild symbol acts as a wild and substitutes for all symbols.
Finally, landing 2, 3, 4 or 5 Bonus Wild symbols during the feature will reward you with 2, 5, 7 or 10 extra free spins respectively.
Bonus Feature Bet
Non-UK players can buy their way into the Lumberjack Spins feature for a cost of 85 times your total bet. With the RTP rate rising to 96.59%, you will trigger the feature with at least 3 Bonus Wilds. Finally, the max win probability is 1 in 3,576,538 spins.