Hello guys, I was getting asked a lot about the Clash Royale Card upgrade costs in Clash Royale lately. Sorry for the delay my friends! Here you go, an individual post where you can find everything about upgrade in Clash Royale!
In Clash Royale, you need to obtain a certain number of Clash Royale cards in order to upgrade them. After upgrading, all Clash Royale HP and damage stats of them get increased by approximately 10% per level.