Lava Burst Slot by Evoplay

Six symbol types, zero paylines, and a 4x3 grid built entirely around bonus activation. Four symbols across the central row launch either the Bonus Game or its souped-up sibling, the Ultra Bonus Game. There are no regular wins here - every payout routes through the bonus round.

Bonus Coins carry values between x1 and x4 bet. Heavy Coins (x5 to x9) are stickier - they lock onto the reels between spins and wait for a bonus to trigger. Change your bet, though, and they vanish. Mystic symbols transform at bonus settlement into any other type, and the Mystic Jackpot variant always resolves into one of three fixed prizes: Mini (25x), Minor (50x), or Major (100x).

The Black Hole is the centrepiece. When it lands during a bonus round, it absorbs every value and jackpot from all symbols already on the board. One well-placed Black Hole after a streak of Heavy Coins and jackpot symbols can consolidate the entire grid's worth of prizes into a single cell. It shares DNA with the collector mechanic in Queen of Sirens, but the fire theme and cell multipliers set it apart.

Lava Burst adds a second escalation layer. Random comets (1 to 12 per activation) slam into cells and leave x2 multipliers that stack - hit a cell already carrying x3, and it climbs to x4. These persist until round end, so a Heavy Coin worth x9 sitting on a x4 cell pays 36x at settlement. The Ultra Bonus Game triggers randomly, starts with pre-filled cells, and fires Lava Burst comets more frequently.

Two buy-in options bypass the base game entirely: 32x for a standard Bonus Game, 100x for the Ultra. The Grand Jackpot at 1000x requires filling all 12 positions.