Cortana is a virtual assistant created by Microsoft for Windows 10, Windows 10 Mobile, Windows Phone 8.1, Invoke smart speaker, Microsoft Band, Xbox One, iOS, Android, Windows Mixed Reality, and soon Amazon Alexa.
4. Wait until they reply and you should get the skin :) HOW TO GET GREY WARWICK SKIN FOR FREE In order to get free Grey Warwick skin, you need to have at least 3 friends who have reached level 10 on your Refer-a-Friend program.
Edit: The rewards are the Loyce Set, the Ivory King's set (once you get 50, you can buy it from the armor seller in Majula), and Alsanna's soul (also requires 50 Loyce souls). ---.