Anivia

Anivia is a bursty caster with sustained crowd control and a lot of unique utilities. She is revered as one of the stronger casters in the game. However, she requires a large amount of synergy on her team. Anivia is best partnered with teams that don't chase and fight in groups. She has a large amount of AoE damage, but her main damage will be single target burst. She provides stuns/slows/a wall/pushing/protection to teams. Anivia is often considered to be too reliable upon blue buff.

Pros

 Good laning with immense pushing power post-6

 Insane utility

 Can peel and kite (without Rylai's) very well

 Has an easy time farming post-6

 AoE hard and soft CC

 Several zoning tools

 High damage without damage items early on

  Great burst and fair sustained damage

 Among the highest overall ratios in the game

 Arguably the best skill in the game: Crystallize

 Arguably the best level 1 mage in the game (due to long range skillshot AoE stun)

 Does not fall off (i.e. bad early game =/= bad late-game)

 Has the ability to control where and how a teamfight plays out

 Easy to pick up

 Egg

Cons

 Slowest movement speed in the entire game

 Lowest health pool in the entire game