So this came out just the other day and I've already got about 15 hours into it.
I'll just give a list of what makes it unique.
There are 5 rounds, "Chapters" as they're called and you can only play 4 cards per chapter. Thus at most you can only play 20 cards per game.
Instead of playing mana or gaining it each turn, you have to manage your Attack, Health, and Gold all while building up your Legend while breaking down your opponent's.
You kill your own creatures and try to make it that your opponent can't kill theirs, which is pretty unique approach.
It has a charming art style imho.

Personally I like how different the 5 legends are, but I will say Linza is a bit one-dimensional and Ariane feels a bit too strong at times.

But anyways just shilling cause I like it a lot. You can find it on steam or at https://www.rschronicle.com/