Free spins and expanding symbols
Landing 3, 4, or 5 Golden Tomb Scatter symbols anywhere on the grid during a base spin triggers the Free Spins feature. You receive an instant scatter payout of 2x, 20x, or 200x your total bet, plus 8 free spins.
Before the round begins, the game randomly selects 1 regular symbol as the Special Expanding Symbol. When enough instances of that chosen symbol land during a bonus spin (at least 2 for premium symbols, 3 for low symbols), they expand vertically to cover all 3 positions on their reels. Expanded symbols pay across all 10 paylines regardless of adjacency, effectively behaving like scatter payouts.
If 3 or more Scatters land during a free spin, the feature retriggers: 8 additional free spins plus an additional special expanding symbol. Older slot machines simply handed you extra spins on retrigger. Here the symbol pool grows each time. In rare runs, continuous retriggers can turn all 9 paying symbols into expanding symbols, which is the only realistic route toward the 5,000x cap.
In plain terms: because so much of this game's theoretical return sits inside a rarely triggered bonus, a typical losing session ends sooner than it would on a low-variance slot with the same RTP. That is a structural property of the math model, not bad luck.