So, how do I effectively counter the Zed ult laning phase?
Hello! This is my first post. I've been playing Vaegir for a while and I was dominating the mid lane vs Zed, but every time he poked me a bit and got me to 1/3rd of health he ults me, doing the typical mark and damaging me a ton. This is fine, but why in the world does the ability repeat the damage AGAIN after I've been taken down to ~100hp? I've played as Zed and played against Zed and I haven't noticed this mark at all. Zhonya's is not an option and the stopwatch is just too expensive for one use. So far my only attempt at blocking the inevitable death was crowd control, but it's pretty hard to stun Zed considering he can just use a shadow to teleport out. Again, how do I counter it as an immobile mage?
By the way, since when does Zed have a Kayn type of ult? [zombie-brand-clap]

or
.