The most immersive idle rpg I have ever played. Study as apprentice, scribe scrolls, buy magic research items to help your study, build magic assistants... things you can think of and things you can not. All those thing bring visible growth to your strength. The downsides are: can not pass ticks when game tab is not shown, no offline progress, prestige system is not an add-on to gameplay and only let you experience what is missed on choose branchs with a better speed.