In about 40 min you will hit the paywall.
There is nothing you can do and all of your progression will halt.
-The only way to get stronger is to level up.
-The only way to level up is to collect cards.
-The only way to collect enough cards is to pay with gold/gem.
-The only way to earn gold/gem is to win hard battle that you cant win.

First time I’m leaving a review on a game because it baffles me how this game has so many positive reviews, very misleading – AVOID at all costs. The first 1-2 hours are enjoyable and then the game does everything (almost feels rigged) to prevent you progressing – unless you put in money. It’s not even pay to win quicker or easier, it’s you cannot go any further unless you pay – They even put up this pay wall early into the game, making the initial grind pointless. Like all cash grabs it’s addictive at first and easy to get roped in, they know what they’re doing.

It's better then Candy Crush, Use the Auto battle feature to get most out you're cards abilities!

Plays like a feature on a pokie machine, not bad.