Pro tips.
If you're a new and a F2P player. Don't ever play the game, you will regret it. This game is not for f2p, farming shards is so hard. Only 5 unit and 2 shards/day and u need atleast 1000x shards to max out 1 unit. Been playing this game since launched but til now I still haven't max out 1 unit. I cant even defeat EX stages.