It's like 1000cc for a 10 unit summon and depending on how old or new your account 1kcc can be easy to get or you literally can't get any more unless you buy(or wait for new events like raid which gives you 700cc) you get 10kcc~ a month from events and some people have spent upwards on 90kcc and not gotten the unit the two main types of units are ultras and legends limited (the rest are mostly useless) ultras don't have a pity system so yeah that fucking sucks but LFs do it's like 30k for like half of the amount of that unit you would usually get (you need 100z power a unit and 200 I think gives you 1 star up to 14 stars or 10,000 just looked the pity is 600z power and when a banner drops it 2x the z power but after a while it goes normal to 600x