The number of free spins increase on the number of times you enter the hall, the levels you climb and which symbol you get, for example, Valkyrie will award ten free spins with a multiplier of five and the chance to retrigger, Loki will award fifteen spins with possible wilds if the hall is entered more than five times and Odin will give twenty free spins with the Wild Raven feature which can turn symbols into either a multiplier of two or three. Two ravens will achieve a multiplier of six. If the player enters the hall more than fifteen times they get Thor spins of 25 with multipliers of five. Unlock all the levels then the player can choose the bonus round they wish to play on further visits to the game.