So I was doing a T3 arcade run to the terminal since I've been trying to get a Raptor recipe.
I got to a treasure vault and one of the boxes had an eternal orb in it, which was pretty cool.
Next floor: first boxes I break: eternal orb.
Considering my knight is on 4* and isn't even technically up to the 5* grind I'd say that's pretty lucky.
I had many lucky moments, for example when i found 3 eternals in one box and 2 sparks in the others or when i got asi high during crafting. I know someone that in a single bk event had over 6 books, which imo that is some rng god stuff. *vietnam flashbacks*