@JeremyECrawford Do you need Find Familar or Steed prepared in order to use the features? #DnD
— Jeromy D'Amico (@Herodragon33) June 27, 2016
A spell's effects last for its duration. The spells you later prepare aren't pertinent. #DnD https://t.co/HF2pDGI6EM
— Jeremy Crawford (@JeremyECrawford) July 21, 2016