FROZEN 2: Spring is better than winter

Queen Elsa finds something in Anna when she goes to Pabbie to erase her memory again. Pabbie found something in her head something very very powerful that can destroy or make the world a better place! Would the power be to strong for Anna to control or would it control Anna. Is it to much for Elsa to handle. Would Anna use her powers for good or would it go to her heart and make her evil!!