I think Syndra needs some form of cc immunity

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On the surface it looks that way, but they are actually a lot a like

Immobile mages? Check Ranged aoe cc? Check Big impact ults? Check

They are not identical, but the point that I am actually making is that it would be insane to give Syndra cc immunity, yet the very similar Malz has it. My issue with Malz isn't that I think he is op it is that one of the major reasons for the rework was that his old kit was deemed unhealthy. The reworked Malz is arguably even more unhealthy than the old one.

Uh those 3 things also match Orianna, TF ( Usually immobile except for ult) Cass, Annie, and Zyra. So you're list is a little to broad because it covers a range of champions that are nothing alike for the most part....