Elder Scrolls Legends...
A relict from a time, when Hearthstone reigned the card-game-scene, and better competitors had to close their gates sooner or later, as they did not manage to generate income.
I remember, well how torn this situation made me:
I love card-games, and was extremelly grateful, that they had finally made their breakthrough into the esports-scene. But, at the same time, Blizzard exploited their monopol merciless, and locked Hearthstone behind a heavy and neverending paywall.