Each Portal effect continues until a cascade does not result in a win.

This feature starts with three random Portal effects for 42 symbols and a special Portal effect for every three extra symbols, up to a maximum of seven Portal effects. If you manage to collect 42 winning symbols, you trigger the Other World Free Round Feature. This means that a random symbol is chosen and all incidences of that symbol are removed from the grid and used to charge the Portal. If these wilds form part of a winning cluster, the Void Portal effect is triggered. Twenty-seven winning symbols add two Special Wilds to the grid.This means that all the symbols in the same row or column as a special wild are put to use to charge the Portal. If these wilds form part of a winning cluster, the Abyss Portal effect is triggered. Fourteen winning symbols add two Special Wilds to the grid.Seven winning symbols add two Special Wilds to the grid.

You can activate certain features, depending on the total number of winning symbols that you achieve. The power continues to increase for every consecutive win that you achieve. When you achieve a winning cluster, you will notice that the power of the portal increases. The Portal is located at the left-hand side of the screen. If you line up a winning combination on top of where an eye mark appears, two Special Wilds are added to the grid after the win sequence is complete. Pink eye marks can appear at any time during the base game. The final type of wild symbol is the mega-wild which features a creature that looks a lot like a giant octopus.

The x2 wild symbol is Rich Wilde himself. There are three different symbols which can help to create winning combinations in different ways. There is not just one wild symbol in this slot game. There is plenty of excellent bonus action to enjoy. Tome of Madness is not just about the base game.

Tome of madness slot review