Anivia
Ezreal
Karthus

All very good and rewarding to play.

Anivia is Probably the hardest champ to master and play correctly, dont buy her and think your gonna rape face... at first .

Ezreal is really seems to be a one trick pony if going AD which everyone argues is the best now.

Karthus is ... a complete A-hole He's easier to play than the other champs, most annoying ult in the game hands down, not a bad choice.

Malzahar not mentioned, but hes the underdog, Very hard to play, misunderstood champ. Hes very viable now that they "Fixed" Cleanse. He is in the top 5 for hardest to play.

The others arnt worth the price :*(

Karthus will also break the Q key on your keyboard.

^yes

You pick him when you see your teammates have picked initiators and tanks. And you get the impression they are aggressive and manly, which allows you to pick the soft sneaky game-changer.

All the other characters of the same cost: get raped so much more by anvia than she does by them. Assuming of course that whoever is playing her isn't a complete fool, which is the same for almost all champions.

6300 - ez
450 - kayle

ezreal

corki

Every champ is op in the right hands. With that said:

6300- twitch (blitz is not a great overall champ, but a well used rocket grab can take over a game like no other ability.)
450-soraka. she is not as fun to play, but she makes teams win period.