A question for those who have Card en Ciel

How's the content and replayability of the game? I understand what the game is about, I have tried the demo, I know what roguelites are and I read reviews. Most of the ones I have read fail to answer 1 question though: replability.

I play and love Slay the Spire, it doesn't actually have a lot of unlockables (or even any at all, iirc?), is this game like that? Or does it reward repeat playthroughs where there are a ton of unlockables and things become new every subsequent playthroughs outside of the player's skill itself improving?