Forgotten Lore

An online trading card game, powered by a single dev's passion! Forgotten Lore has online matchmaking, playing with friends, an actual in-game text chat with your opponents, workshop support for player to design their own cards built into the game, a complete deck builder with support for as many decks as players can create, tons of unique cards, and an ambitious Tome system. If this wasn't enough, players within Forgotten Lore completely control the community's economy.
summary by MetaCritic