A lot has changed since the last time I played Splinterlands. It turns out I couldn't use most of my cards in the new format - Modern, while I will have to buy a Wild Pass for 2000 DEC to gain access to Wild format which I believe was the original format. 
Another thing is the introduction of a new in-game currency - Glint. It is now the standard reward for winning a battle in the arena with some bonus Splintershards. 
Unfortunately, the daily focus is gone - it was one of the exciting features of the game back then. However, change is inevitable and hope they could replace it with something better soon.
By the way, here's the battle result of the last game I played before writing this. I could barely win a battle.
Thanks for your time and have a great day!