There are a number of fantasy-themed slots and one that catches your eye is Microgaming's Avalon slot, based on the story of King Arthur and his Knights of the Round Table. The slot has 5 reels and 20 adjustable paylines. The minimum coin size in this game is 0.01 and the maximum is 0.50, and you can bet a maximum of 10 coins per spin. The minimum payout is 20p across all 20 paylines (1p if you are using just one payline) and the maximum is £100.
Avalon has an interesting array of symbols: a crown, the Avalon coat of arms, a silver goblet that could be the Holy Grail, a jewelled ornament, and the numbers 10, J, Q, K, and A from a regular deck of cards. There are 2 wild symbols: a treasure chest and Avalon in the clouds, while the Lady of the Lake is the scatter symbol. The treasure chest wild substitutes all other symbols except the scatter during the free spins bonus round, while the Avalon in the clouds wild substitutes all other symbols except the scatter in the base game.
The bonus game in Avalon is the free spins bonus round. This round is triggered by landing 3, 4, or 5 scatter symbols across the reels. You get 12 free spins with a multiplier of up to 7x. The free spins can be re-triggered to give you 12 additional free spins. Both the wild symbols are active during the bonus free spins round. You can also use the Gamble feature in a double-or-nothing play: winning doubles your win amount from the spin and losing makes you lose it.