Talk:Artoria Pendragon (Santa Alter)/@comment-2001:E68:543C:2F86:FD49:D058:F022:19B1-20171205103140/@comment-30468100-20171205104003

Assuming you are playing the North America version, just play the current event. By getting stockings from beating the missions, you can spend them in the event shop on a kind of roulette spin. The grand prize is a ticket that will get you one copy of the Servant. After getting it, you can reset the spin up to 4 times to get 4 tickets in total.

Now, in one or two days time, the story mission for this event will come out as it has each day so far. On that particular day, completing the new story mission will grant you one version of Santa Alter. Getting the original version will then unlock the option to trade those tickets for further copies of her in the store, allowing you to increase her NP level.

So basically, just keep beating the story missions each day to get your first copy, play the roulette spin to get the chance for more copies after that one.