>>532265881
All the EX Stages are bonus challenge levels for people who want extra rewards and would like to have some fun with them if they're too stronk for the normal ones, at least from my understanding. So don't worry anon, you don't need to do them at all. But if you do, the rewards can be good and they're honestly quite fun!

Also as an aside, Lucretia has finally achieved MAXIMUM BIRD UP!
OH YEAH