Predatory IAP trap ruins a good game
While this is a very solid Idle RPG it does hide a very predatory business model. This is a game where eventually it becomes about swapping out the right characters for the right lvs. Things will straight up be immune to certain damage types rendering units completely useless in certain areas. But once you get to the power lv where unit swapping becomes mandatory to progress suddenly it costs premium currency to swap out units. The game does give quite a bit of currency naturally but it is designed to make players eventually hit a paywall to progress just to keep switching out units. You can still get quite a bit of enjoyment from the game without spending a dime but if you are looking for a long term investment into a game this one will hit you with a hidden paywall eventually