Moor than expected

La Cieca guesses we will have to make these quizzes more challenging. Even the (as we thought) impossibly obscure Otello of Spas Wenkoff did not baffle Hugo Santos, who nailed every single Otello in last week’s quiz.  After the jump, though, there’s one last bit of puzzlement.  

The “magnificent phrase” was, in fact, not a Verdi original!