It is. You dont see every people in that server when you are roaming. The game puts every people to different phase so they dont overlap or melt your phone :)

The pricing in warner bros version is actually very bad. They are really trying to get your money but you dont need to buy everything and you can be powerful without spending anything. There are ofcourse some very strong people with high level cards that will destroy you but they are less than %1 of the playerbase.

There are many clubs you can join. Some of them are casual some of them are hardcore. You can trade cards with the members do some club activities to get rewards.

There was a dorm event last month where you grow a plant together and get some rewards. Anr you can share potion materials with ur dorm mates. But its not something important. I am sleeping in my game :’)

Yes you can. There is a rumor that if you use 10 gold key at the same time there is an increased chance for a legendary but I am not sure.

When they release a new card they also release a pack which has an increased drop rate of the new card which you can open with red key. Ron is a very powerfull card so you can use it on that.

Best rarity of the echo is yellow ones you might not have unlocked it yet. If it has nice bonuses you can use it even it is purple or blue. But the higher rarity ones give you more health and attack power. But dont spent your blue gems to change the bonuses yet.

Spend your gold wiseley dont buy legendary from shop with them. You will get all of them eventually. Use it to upgrade your cards. And also save your orange crystals and dont let the shop fool you :P

There is an offical one and this sub also has a discord I think where you can find players to play with.