Fire Portals Slot by Pragmatic Play

Five or more matching symbols connected horizontally or vertically form a cluster win on the 7x7 grid. Winning symbols are removed through a tumble mechanic, and new symbols drop in from above. Tumbles keep going until no more wins land.

The central mechanic revolves around Fire Portal Wilds. Any win that doesn't already contain a Wild spawns one at a random position within that cluster. The Wild starts at 1x and its multiplier climbs by 1 with every win it participates in. After each tumble, the Wild shifts to a new position. When two or more Wilds end up in the same cluster, they merge into a single Wild whose multiplier equals the sum of both. The multiplier cap sits at 2,500x.

Three to seven Scatters trigger the free spins round, awarding 10, 12, 14, 16, or 18 spins depending on how many Scatters land. The key difference from the base game: Fire Portal Wilds become sticky for the entire round. They stay on the grid, keep accumulating multipliers, and keep moving. Wilds already present on the triggering spin carry over into the bonus too, so a lucky trigger can start the round with multipliers already in play.

The combination of persistent Wilds and merging multipliers means late-round tumble chains can snowball fast. A pair of Wilds at 50x and 80x merging into a 130x multiplier on a large cluster is where the 10,000x max win potential lives. Base game hits tend to be smaller since Wilds disappear between spins.