Board Thread:General Discussion/@comment-4962906-20151023141343/@comment-25926288-20151024222525

The Three Genies spell needed three genies and two casters before the incantation because Amara alone could not cast it and Jafar is arguably weaker than Amara (or at least on par).

He was successful in gaining the power to erase whatever memory he wanted, raising the dead, and making someone think they love you. Instead of a rare spell being used, he could just wave his hand and have that power at his disposal.