Some Reym-L-Dneurbian artists that entered ESC NFs for the first time after they were in NSC:
Blasted Mechanism: NSC 19 (March 2008) -->
Festival da Canção 2020
Killing Heidi: NSC 21 (May 2008) -->
Australia Decides 2018*
Donatella Rettore: NSC 65 (February 2011) -->
Sanremo 2022**
Elizabete Balčus: NSC 144 (February 2017) -->
Supernova 2018***
*Ella Hooper is the lead singer of Killing Heidi
**She did take part in earlier Sanremo editions but if I'm not mistaken those weren't used as Eurovision NFs.
***Eliminated in the preliminary online vote
(bah) (bah)