You can get high-level characters (level 1-7) from Scratch Cards, Events, Bundles, etc. when they are featured.
With this system, you don’t need any gold to upgrade these characters, and you will obtain them instantly at specific levels.
* If you get a level 6 Sky Master when you have a level 2 Sky Master, you will instantly get a level 6 Sky Master without spending any Gold. However, if you win a reward equal to or lower than your character level, you will not get any diamonds, the cards won't turn into diamonds.