Stupid pay-to-win game with no strategy. Everything is randomized, from the cards you get to the cards you play.
You can only put cards in your deck but you can't control which one to play. You can only hope the randomizer is on your side, and most of the time it isn't.
The campaign is tolerable but the PvP arena is extremely bad. I often lost to opponent half my level with less cards and less hit points. My cards sequences were so badly randomized the opponent easily won.
The most obvious "random number" cheat is the coin flip at the beginning of the battle to determine who goes first. Normal coin have 50% chance to win. But when I play, I only go first 25% of the time or less.
Even opening a loot box you got after winning arena battles requires you to pay premium currency or wait hours before you can do so. Also, you can only hold limited number of boxes. If you want to hold more you have to pay premium currency.
One of the worst "free" game I've played. Avoid it like plague.
Can anything other than Realism movement ever accepted into Salon de Paris competition? Anything else, however good, seem to be all rejected. Was the 19th Century art critics this close-minded in reality?