Queen of Sirens Slot by Evoplay

A 3x3 grid sits in deep ocean ruins, populated entirely by bonus symbols. There are no traditional paylines or regular wins here - every payout comes from the bonus game. Landing three symbols across the central row triggers a hold-and-win round with 3 respins that reset each time a new symbol sticks.

Six symbol types fill the grid. Bonus Coins carry values of 1x-4x bet. Sticky Coins hold 5x-9x bet and remain on the reels between base game spins until a bonus triggers - building toward activation. Mystic symbols transform at the end of the bonus into any other type, with the Mystic Jackpot variant guaranteed to land one of three jackpot tiers.

The Octopus is the centerpiece: it carries no value itself but collects every coin value and jackpot from all other symbols on the grid when it lands. One well-placed Octopus during a loaded bonus round consolidates the entire grid worth into a single payout.

Luck of Aurora fires 1-9 comets into random cells during the bonus, stamping each with a 2x multiplier. Repeat hits on the same cell stack the multiplier higher. The Ultra Bonus Game, available randomly or via the 75x buy bonus, guarantees Luck of Aurora at the start and triggers it more often throughout.