Early access card game, still free to play.
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Pros
Pro Deep strategy card game that is truly free to play.
Pro Hundreds of card in each of 3 sets and many more in each adventure.
Pro Free packs just for logging in and winning a game every day.
Pro Magic the Gathering like
Mimics Magic the Gathering's ruleset.
Pro Complete Asynchronous Limited environment.
In draft you pick cards at your pace. You can even close the game mid draft and pick it up where you left off. Whether it is 5 minutes later or 5 weeks later the draft will be waiting for you to complete it. These are actual packs that were picked by actual people not randomly generated cards this allows for signals to be read by skilled drafters.
Cons
Con P2W - Game is not actually "free to play" unless you don't care about winning
Rare cards are very powerful, and very difficult to get unless you pay for packs.
Con Still in early access
Game isn't fully finished yet, so crashes and balancing tweaks may occur until the product is in a more stable release.
Con Appears to be heavily inspired (or even copied) from blizzard's Hearthstone
Board layout, card layout etc appear "oddly familiar" if you've seen hearthstone.
Con Steep learning curve
Although the tutorials are good, it still takes a long time to understand the game mechanics.