To join the Ice Wolf Coven, Emma needs to complete challenges at 6 levels.
On the first three levels, she must collect golden keys over buildings, catch the lights of lost souls between pipes in Japan and crystals in a cave, for which she receives the Ring of Witches.
At 4, 5 and 6 levels, Emma collects berries in the Forest of Memory, diamonds in the treasury and stars in the sky. For this she receives the Bracelet of Strength of the Three Mages.
Thus, having collected the ring and bracelet, Emma gains tremendous power and becomes the last, 13th, witch of the Ice Wolf Coven.