Talk:New Year 2017 Summoning Campaign/@comment-30937535-20170104144133/@comment-29893250-20170104174809

660 quartz is unlikely to yield an  NP5 Scathach. Sometimes RNGesus is with you. Sometimes not. However statistically speaking, it is a 1% chance to get a 5 star. Ignoring sum math and the like (2 rolls is 1% and 1%, not 2%. 100 rolls is 1% 100 times, not 100%), you're looking at 300 quartz as a generic baseline to get one five star. This number drops if you do 10 rolls due to the gauranteed servant and gauranteed gold card but only to 220 or something. I forget exactly. Someone did the math before. 660 quartz yields you a pretty high chance to hit a 5 star. But the trick is that that is A 5 star, not THE 5 star you want. It is very possible that you'll get bombarded with non Scathach 5 stars and theoretically wouldn't roll her till you'd spent some large amount of cash. And there are people who spent the value of a used car on Scathach. They are a meme but they're also real.

As for rolling times, there's various superstitions but they are simply that. Superstitions. There are lucky and bad luck streaks but the method of reading them seems a bit more questionable. Regardless, you've saved up a lot longer than a lot of f2p have so hopefully she'll decide to grace you with her presence.