Okay, I've been playing this one ArmorGames and I can say it's fun. I played the first Rise of Mythos alot and this release is a lot like it. A few things have been changed compared to it but nothing major.
Pros: You get a decent amount of gold for cards.
If you liked Rise of Mythos this is fun too.
I personally like the mana concept better than the time concept
Cons: It's a R2game, you know what that means.
While it may not seem like it, the game uses cross servers. Once you've reached a milestone (20,30) the game brings people from other servers. In the arena it's a huge problem. As someone who is 30+ you will face level 45 people and that means you will have weaker cards.
Also, after 30+ the game becomes barren. There's some new dungeons but that's about it.
There's not much choice in the game. You're basically forced into playing a rush type deck or you don't stand much of a chance.
My final verdict is that I like the game, but I don't see too much of a future for it.