Jewel Boost Reels Slot by Mascot Gaming

Emerald green felt, gold trim, and a paytable split between faceted gemstones and classic fruit. Jewel Boost Reels is an honest fruit machine dressed up with rubies and orange gems as premium symbols, while watermelons, grapes, lemons, and limes fill out the lower end. The red ruby is the standout - it renders as a large multi-cell diamond shape spanning two positions on the grid, paying 400x per line at five of a kind.

The mechanic worth paying attention to is the Wild Reel transformation. Regular Wilds substitute as expected, but they can also convert into full-reel Wilds that cover an entire column. During free spins (triggered by three Scatters), these Wild Reels become sticky, locking in place for the remaining spins. Stack two or three sticky Wild Reels and the 10 paylines start overlapping through Wild columns on every spin. Extra free spins can retrigger during the round, extending the window for more reels to convert. That's where the 2,000x cap lives - multiple sticky Wild Reels running simultaneously while the free spin counter keeps resetting.

The Boost button on the right side of the screen doubles your bet in exchange for better odds on those Wild Reel conversions. It's an ante bet, not a buy bonus - you still spin normally, just at 2x cost with enhanced transformation rates. A post-win gamble option rounds things out with a double-or-nothing coin flip, capped at 5,000 coins regardless of your bet level.