I think I have the perfect Leader Nerf
He's one of the most talked about cards the game and most of that seems to come from the negative side. At lower levels, he's a menace to players, while at higher levels, alot of the decks used render him useless. But there may be nothing more frustrating than losing to him.
Nerfing him to 6/3 isn't going to fix a ton of the issues with him, just very slightly narrow the situations that make him viable.
So here's my nerf: 5/3 and like Magic, can only be played before turn 6.
Now, you still will be aggravated when someone plays it, but you yourself still control you fate on the last turn.
Also, it will take down occurances of Leech/Leader excepting cards or locations that make it possible.
And it helps against another annoying card: Professor X.
Let me know what you think. Great idea, dumbest idea ever, or anywhere in between.