Avalon Gold Slot by ELK Studios

ELK's Gold series has been sending the explorer Kane through different civilizations since Ecuador Gold, and this entry drops him into Arthurian ruins. Golden masks and animal crests - dragon, raven, unicorn, wolf - spin on colored tile backgrounds while stone-textured royals fill the lower pays. Misty temple columns and ivy in the background. The medieval dressing is surface-level, but the symbols read well against the expanding grid.

Same avalanche engine the series is built on: 6 columns start at 4 rows, and each cascade win adds another row up to 8. That takes the ways count from 4,096 to 262,144. Mystery Boxes are blocking symbols that activate when 5 or more land at once, and every box reveals the same result - regular symbols, wilds, or Avalon features. Those features include coin values (multiplied by bet), multipliers that boost previously revealed coins, a +1 Swiper that prepends a digit to the last coin (turning 5x into 15x), Collect (sums all coins and reactivates boxes for another round), and Redrop (fresh symbol drop with guaranteed reactivation). Collect chaining into Redrop into more Collect is where the big numbers come from. Five boxes revealing five low coin values with no chain is the more common outcome.

Some regular symbols hide Expanding Wilds underneath. When a winning combo passes through that position, the wild reveals and stretches upward through every empty cell above it. On an 8-row grid, that is a full column from one trigger. The 50x X-iter tier guarantees 5 Mystery Boxes on a single spin, 100x buys the free drops directly, and 500x gives you persistent boxes that never clear between drops - turning the bonus into a continuous Avalon features loop.

Free drops (10 from three scatters, up to 25 from six) use a Safety Level system that separates this entry from earlier Gold games like Ecuador Gold. Each drop that produces an avalanche win advances the Safety Level by one row. Subsequent drops start from that floor instead of resetting to 4 rows. One strong early drop at 7 rows locks the minimum grid size for every remaining drop. Mystery Boxes also persist between drops until they activate, accumulating toward that 5-box threshold across multiple spins rather than needing all five in one shot.