Frenopolis is an open source gamified microcosm where players seek to outmaneuver each other to control the elements and their manifestations which comprise the world.
It is easiest to learn with any YGO/MTG experience.
You can request a free physical 2-player/90 card playtesting starter set by following the instructions in description of this video:
(no identifying or payment information required)
https://youtu.be/oPoBUoagO_k
Tabletop Simulator demo implementation:
(let me know if you'd like to set up a game)
https://steamcommunity.com/sharedfiles/filedetails/?id=3532880446
Physical Game Demo:
https://youtu.be/KIGdAsFzgHI
