Would be interested in working with you to improve-finish the game.
These are the things i´d help you with
Player vs player
with ranking system: top ranked players get prizes weekly (keeps them active), ranking resets monthly or weekly
Card interface
Stacking and sorting of cards, shred multiple, buy mulitple cards / packs. Unpack bought cards instantly.
Auctioning of cards,
- currency gold for every thing non-legendary and kreds for everything legendary (with a 1 kred cost to list, which is given to developper)
Resource fix
default cost of drawing cards should be lower, decreasing the need for a good starting hand.
In the end it doesn't matter, but it's the fresh players who decide to stick around or not.
Alternate ways of winning
I really like how some cards have an effect on the battlefield, damaging portals if X happens, but spells need to be a bit deeper. For example being able to persuade an enemy unit.
this is going to sounds familiar, but combat speed needs to go up. The game is still entertaining, but the small amount of cards make the game get old really fast.
But then again i play MTG and i'm used to learning 1000 new cards / year :)
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 "Bloons Tower Defense 3"){kind=icon}
 "Mytheria"){kind=icon}
 "The Necronomicon"){kind=icon}