This is a secret nerf, since Rito finally realized that Fizz's untargetability was "unhealthy" in lane. For testing purposes, it's only been activated on Vi, but when it goes fully live, getting hit by even a single ability from any champ will remove your ability to e for the next (6/5/4/3/2) minutes, to teach you to either use your e to dodge everything, or get it taken away. Rito feels that this change will help low-elo fizz players learn to abuse the most BS portions of his kit, for fear of losing it, while also offering "counterplay", by ensuring that his opponents can take away his e by spamming enough skills in his direction and hoping one hits. For compensation, Fizz will become an energy-based champ, and the cooldown on his e will be reduced to (2.5/2/1.5/1/.5) seconds.
(EDIT - yes, this is satire.)