Ana held her wand firmly and try to focus "Protego!" nothing happened not even a little light. Oh please work...and work fast she thought. She tried to concentrate harder and once again she said "Protego!" this time a weak light formed but if her life depended on that she could say bye to it. She sighed. But giving up it was not on Ana's nature so she reunited all her attention and energy to her wand and mind, she closed her eyes for a few moments and then "Protego!" she said and a shield appeared. Not a perfect shield but good to start.