Blood Lust Slot by ELK Studios

Three scatters don't just award a flat number of free spins here. The game draws an imaginary rectangle around every scatter position on the grid, and every symbol cell inside that rectangle counts as one free spin. Scatters bunched in a tight cluster might give you 4 spins. Scatters that land on opposite corners stretch the rectangle across all 15 positions, which means 15 spins from just three symbols. Where scatters land matters more than how many show up.

Stacked symbols drive the base game. Before each spin, every reel loads up with a randomly chosen symbol that fills most of its positions. Two reels picking the same premium vampire across 99 paylines can pay 20-30x on a quiet spin. A dedicated Respin symbol appears exclusively on reel 5 - when it hits, the game picks one random symbol type already on the grid, locks every instance of it (plus any scatters), and gives one respin with the rest of the reels refreshing. During free spins, the respin still fires, pausing the bonus round until it resolves.

Free spins run on a collection system tied to three vampire characters painted in rich jewel tones against a dark castle interior. Each vampire has a meter: 15 symbols to fill the first, 25 for the second, 35 for the third. Complete a meter and every instance of that vampire on the reels permanently converts to Dracula, the top-paying symbol, for the rest of the bonus. You also get one extra spin per meter filled. Completing even the first meter in a short bonus round takes dense stacks and some luck. Filling all three compresses the entire paytable into Dracula payouts, but 35 symbols in 4-15 spins is a steep ask without retriggering.