Cardeneer

Let me preface this with the fact that I don't really like Card Games. Then look at the hours I have in this one. That should tell you all you need to know.

On the road to be most complete and flexible TCG editor ever made. Cardeneer is all about possibilities and creativity. It has countless ability combinations, and more are added on a weekly basis. You can add custom art and have full control over card design, or use templates and included assets. Code is accessible to modders, LUA scripting support is growing, and the GUI resources are huge. What make Cardeneer special is playing the games you made. PVE challenges, survival mode, drafts, online PVP, progression system, everything is there. There is a roadmap for custom modes where you can design your own game style. AND IT'S FREE. Community is very active, and new mods are always showing up. Discord channel is friendly and helpful. There is events and tournaments, and community driven updates. Like every EA game, there is some rough edges, bugs will happen, UI still need some polish, but Cardeneer is surely worth a shot.