I would like a list of the features that someone could get by leveling up.
When is Multi-Attack unlocked?

What level do I have to be to unlock Multi attack?

Level 23 unlocks the ability to see your opponent's orders once a game. I'm not going to use that feature very often because I am an honourable player, but just look at hedja making so many points at the moment...

You get to see an opponent's orders once a game? Like a spy card? I thought levels didn't make you stronger :/

Yeah, you get one super-spy card automatically added to each game. It's called "Prism Card".

A friend of a friend tells m at level 30 you get a Luck card. It automatically tripples your positive luck for one round.

I don't know why Fizzer didn't call it "Illumination Card" though - that's a much better name, don't you think? I suppose he didn't want to give us too many clues?

I like that someone is talking about what level 30 nets you when no one has yet reached level 30.

I've also heard that at level 100 Fizzer visits your house and gives you an enormous bunch of flowers...

And at level 1000, Fizzer sends a hit-man after you.

Gnull you are such a troll :P

Level 23 here, i can confirm what gnnull said is true. Very useful card!