This game is actually (and rather surprisingly) good. The only bad part is the writing - it's full of memes & pop-culture references & lolrandom stuff, so it comes out as rather tryhard-ish. But visuals, on the other hand, are pretty good (even the memes - lots of art is based on them) so, as long as you skip the text, it's not very annoying. I'll stress on this - the lead artist of this game is really talented and it's joyful to look on his works.
But the most important part is that the core gameplay is rock solid. Yeah, you draw cards, sure, you roll dice, but the game is anything but random - all the abilities, deckbuilding, equip system (that one is badly explained in-game - basically, you pay points for the card now so later you can cast this card with a discount; great in early game and for expensive combos which are impossible otherwise; like, say, Juggernaut + Here's Johnny = whipe all minions on the board) and just the right plays allow you to prevail literally no matter what. The game is not very hardcore, but also isn't too easy - I say that the difficulty is just about right.
Each class has its own cardpool (4 classes and ~170-ish cards in total) plus there's a bunch of common cards, shared between everyone. I wouldn't say that the possibilities are endless, but it's more than enough to have a fun run through main campaign (which is about 6-7 hours). Maybe with a bit of experimentation too - you can recruit several sidekicks and they have slightly different abilities from the player's version of the classes and, surprisingly, that changes their tactics a lot. So, considering there are four classes, one can expect something like 30 hours or so of rather fresh gameplay. Which, for 15 bucks, seems to be pretty good.
Anyways, it's a pretty nice one, dunno why there seems to be zero attention to it.