During ZZZ updates 2.3 and 2.4, if you perform a grand total of 180 pulls on the limited banners, you can get the skin for 'free'. If you were to, say, go from zero to 180 pulls, it would cost you 28,800 polychrome. If my maths is anywhere near correct, it tells me that's around 18% of the price of 180 pulls. Meanwhile, you can get Zenless Zone Zero's Komano Manato a shiny silver skin for actually zero cost in an event, along with a copy of him. To see what other Zenless Zone Zero events are going on, check out our guide, and use the Zenless Zone Zero codes for some extra polychrome - you're going to need it.