Desertion

• WWizards of the Coast2004-10-04
  Official Ruling
  If the spell is not countered (because the spell it targets can't be countered), then this card's ability does not put the card onto the battlefield. The spell continues to resolve as normal.
• WWizards of the Coast2004-10-04
  Official Ruling
  The card is put onto the battlefield, but any effects that check if the original card was "cast from your hand" will not trigger or otherwise consider the card to have been cast from your hand. The card was put onto the battlefield by the effect of Desertion instead.
• WWizards of the Coast2024-04-12
  Official Ruling
  This spell includes a replacement effect. If the target is an artifact or creature spell, it never goes to the graveyard.

Rulings via Scryfall