Studio's latest blockbuster slot features new jackpot bonus that awards Multipliers of between x5 and x2, the player's stake. Studio's latest blockbuster slot features new jackpot bonus that awards Multipliers of between x5 and x2, the player's stake. Special Features. Online gambling is illegal in some. . The Gem Of A Joker slot will be available with William Hill Vegas until September when it will launch with all Live 5-partnered mobile casinos. Grab 10 Free Spins to play a trio of fun-filled games, each day you stake € Choose from: Gem of a Joker Instapots™ · Starlite Fruits™. Developer Live 5 has announced the launch of its new slot Gem Of A Joker InstaPots exclusively with William Hill Vegas. Grab 10 Free Spins to play a trio of fun-filled games, each day you stake € Choose from: Gem of a Joker Instapots™ · Starlite Fruits™.