Lulu patch notes state "Fixed a bug where Event Horizon stopped stunning units if Veigar died." As far as I can tell, Event Horizon hasn't been changed at all.
I play Veigar frequently, and since the patch have died several times with Event Horizon active. Once I'm dead, whoever killed me will simply walk through Event Horizon like it isn't even there.
I noticed this too. I was really excited about that update, but I got confused when they just ran through it like always.
But at least it stays there like they said! Guess they didn't say it would work
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