Small Veigar tweak.
So I had an idea the other day that started out as a total joke, but turned out to be something I think would make veigar a high level pick, while still not breaking him.
Primordial burst: NEW... Upon killing an enemy with this skill, Veigar gains a 1 second stealth and 20% movespeed for 1.5 seconds.
Maybe add a few seconds to his R CD or something to compensate, but I feel like this would promote more aggressive Veigar play, at least in teamfights.