Nevermore

• WWizards of the Coast2011-09-22
  Official Ruling
  You can name either half of a split card, but not both. If you do so, that half (and both halves, if the split card has fuse) can't be cast. The other half is unaffected.
• WWizards of the Coast2011-09-22
  Official Ruling
  The named card can be cast again once Nevermore leaves the battlefield.
• WWizards of the Coast2011-09-22
  Official Ruling
  Spells with the chosen name that somehow happen to already be on the stack when Nevermore enters are not affected by Nevermore's ability.
• WWizards of the Coast2011-09-22
  Official Ruling
  Although the named card can't be cast, it can still be put onto the battlefield by a spell or ability (if it's a permanent card).
• WWizards of the Coast2011-09-22
  Official Ruling
  No one can cast spells or activate abilities between the time a card is named and the time that Nevermore's ability starts to work.
• WWizards of the Coast2021-03-19
  Official Ruling
  If you name one of the faces of a modal double-faced card, players may still play the face you didn't name. (Players can never cast the back face of a transforming double-faced card)

Rulings via Scryfall