Quote Originally Posted by Lookout Zeromus_X
It may be because you've already done the giant of babel. If I'm not mistaken, you can't get sylph (or the spoon/cleaver) , after Yang recovers. But I could be wrong
I'm pretty sure you can just go and get the Sylph summon after facing the Giant of Babel, if you didn't get it before hand. However, you won't be able to get the Spoon Dagger.