[{quoted}](name=INoble KnightI,realm=NA,application-id=3ErqAdtq,discussion-id=R4WHfqaE,comment-id=000e0000,timestamp=2016-09-27T07:19:14.166+0000)
Azir needs it for reliable damage from soldiers. Cass needs it to kite effectively. Brand needs it to land skill shots more easily. Sol needs it to kite effectively. Eve is just a bitch. Elise is just a spider bitch. Most of the mages that get Rylai's is so they can actually kite or apply damage more easily cause they are usually slow moving and simply can not land hits against the highly mobile champs.
Except it breaks their entire design
Lets go with Azir for the primary example. His kit is built around positioning his soldiers, and they (used to) do insane amounts of sustained damage. If you stood in that zone you would die, so you had to move out.
That's all well and good until Rylai's is involved, and suddenly you're permaslowed for 40% as soon as you enter his zone, and cannot effectively position against his soldiers. By the time you leave their range he's moved them again, and has full uptime on you.
Now because his uptime is permanent, his soldiers and Q damage had to be nerfed extremely hard, because Rylai's gives a ridiculous amount of control over enemy positioning. Old Vlad with and without Rylais was a difference of night and day, Azir is no different.