This game is extremely pay to win. There are of course many features that you can do without paying money, but the farther into the game you get, you will notice that you need some kind of special hero maxxed out in order to progress. Some examples are the demonic beast battles that even the pro players have extreme troubles with. I been playing this game since it first came out in the US. The rate of getting a single SSR hero is in my opinion extremely low at 3%. severely disappointing honestly