I'll note that in phase 1 of Mystery #3 (Druid), if you have an empty deck when you cast all six spells, it will not award you the "???" card at end of turn.
Also, I am fairly sure that *generated* versions of the required cards will not count for triggering the "???" event. This happens to be especially relevant for Druid, as it is likely you're Discovering all manner of Nature spells. In particular, the Eclipses gifted by `Kiri, Chosen of Elune` do not count as real Eclipses for the purpose of "???".
I'll note that in phase 1 of Mystery #3 (Druid), if you have an empty deck when you cast all six spells, it will not award you the "???" card at end of turn.
Also, I am fairly sure that *generated* versions of the required cards will not count for triggering the "???" event. This happens to be especially relevant for Druid, as it is likely you're Discovering all manner of Nature spells. In particular, the Eclipses gifted by `Kiri, Chosen of Elune` do not count as real Eclipses for the purpose of "???".