 Elphaba and Fiyero are both taken by surprise by the strength of their feelings for each other , and promise to be together always ( " As Long As You 're Mine " ) . Their happiness is interrupted when Elphaba suddenly has a vision of a house flying through the sky and Nessarose being in pain . Before Elphaba leaves to investigate , Fiyero tells her about a castle that his family owns that she can stay in . 
