The custom modes reinvigorated my interest in the game when I hit the point where the only interesting thing left to do was to make the game harder for myself.
Playing Custom Modes in Slay the Spire Better Scratches my TCG Itch
The Slaying Game: Which Slay the Spire Hero is Your Ultimate Match?
Sometimes the best way to choose a favorite character is through a ridiculous scripted scenario that no one should take seriously.
First Impressions of Slay the Spire, from a Guy Who Sucks at One Step From Eden
Slay the Spire promised an experience where I could take my time to think but still be challenged.
Adventure Rules 