(I wonder if this girl is all right...)
By the way, you can spend 40 Saint Quartz to summon 10 times in a row, the so called 10 Gacha Roll
feature is also available in this game. This guarantees a 4★ card or higher, so you get a much better
rate compared to using 4 Saint Quartz to conduct a single summon.
Director, the 8/31 update now guarantees another 3★ Servant or higher to be summoned.
Check this announcement for more details about the event.