there was another online TCG that got kickstarted called infinity wars, i played it for a while but quickly got tired as getting new cards by free mean was pretty much impossible (at least when i played, i think they changed the rule for getting the currency used to buy new cards) and your starting option sucks beyond balls so it made for tons of "scrub getting floored" game... even then at the time there was only the first set so there wasn't much variety to your opponent (at the moment they got to 3 sets)
some features
- no mana cards,each turn both players get 1 max mana until they max at 10,what cards can be played is decided by...
- their 3 commander,when you make a deck you decide 3 commander card which you can play at any moment, the commander can also use their triggered ability even before being played which means a lot of deck are usualy based around a specific triggered ability
- turns are played at the same time, when combat comes you decide before who attacks and who blocks,then the first creature you declared as a blocker automaticaly blocks the first creature declared as an attacker and so on... spell cards also happen together with combat,so says if i cast terror on a creature you declared as a blocker the attacker go through
- other than standard damage there is also a morale value that decreases when creature dies so it's totaly possible to end a game with a well timed wrath of god
- there are 7 factions/color unlike MTG standard 5... they are
Flame Dawn - kinda looks like a bunch of warhammer 40,000 reject,focusing on punching things really hard with stuff like haste and attack buff,basicaly the red color
Warpath - nature and beastman cards, focus on big/middle creature,mana generation and token making, the green color
Cult of Verore - bunch of cultist and demons, focus on killing things efficently and card that likes to die or when thing die's, basicaly the black color
Descendants of Dragon - feudal japan themed, focus on defense,healing and being a pain in the ass, they usualy try to win using morale damage rather than actual damage, they are more or less the white color
Genesis Industries - focus on robot and mad scientist,this one would be blue but i have an hard time calling it blue,the robot focus mostly on being pumped and supporting each other and +1/+1 counter getting distributed a lot is a recurring theme so rather than says that this is the color blue it probably would be more correct to says it's similiar to ravnica simic faction
Sleepers of Avarach - these guys are zombies,they love being in the graveyard,getting out of the graveyard and occasionaly putting opponent card in the graveyard,they are the laziest bit of the black color
The Exiles - these guys are demons,it's a faction that i don't know much because they added it within the 2 last set but it seems to focus on sacrificing stuff,discarding card and sack effect so i guess the closest would be the rakdos faction?
oh and of course there are factionless card that everybody can play
- lastly every card has animation on it, a fact that they really pushed on their kickstarter, something like 5 whole frame of animation for each card!