You have to face many other online players out there who will be trying to grow their army stronger to attack you and win over you.
Players can easily customize their cards and compete in friendly challenges or 1v1 and against their friends.
I have created a very easy to use generator, it is hosted in the cloud and allows you to generate unlimited gems and coins for Clash Royale.
This will not bode well for you because you will make it difficult for your deck to reach its winning condition.
However, players can choose to play on private servers that are established by modifying the original game.
Clash royale Hack gems Cheats Coins.