Shortest story of Kayle's Invulnerability
Kayle knows that "At the end of its duration, Death Mark triggers, dealing physical damage plus a percentage of all physical and magic damage Zed dealt to the target while they were marked."
So Kayle Ult's to prevent said "damage dealt."
Kayle stays at 100% HP.
Ult falls off, and Zed's ult activates.
Kayle takes 1741 damage and is now at 0% HP.
I'm basically hoping that he can stop pulling damage out of his butthole with this "Ult uses pre-mitigation damage to calculate how much it will do. There is no double mitigation." Crap. (Double mitigation would nerf him into the dirt)
If not, I simply ask that the tooltip is changed to mention this so others don't get mislead. I also often make this mistake when using exhaust on Zed.
I know, I simply have to wait .5 seconds until I actually use a Kayle ult to prevent the majority of his damage. But that was annoying.