Razzle-Dazzler

• WWizards of the Coast2024-04-12
  Official Ruling
  Spells that were cast before Razzle-Dazzler entered the battlefield count. If Razzle-Dazzler was the first spell you cast this turn, the next spell you cast this turn is your second spell.
• WWizards of the Coast2024-04-12
  Official Ruling
  Once Razzle-Dazzler has been blocked, casting your second spell for the turn won’t remove the blocking creature from combat or cause Razzle-Dazzler to become unblocked.

Rulings via Scryfall