How to vs Anivia?

I recommend the match-up section:

http://champion.gg/champion/Anivia/Middle

Don't pick an assassin into her. Her eggbaits and point-blank Q/E destroy them at close range.

Use something that can counter her push and/or destroy her egg, but not open themselves up to the point-blank Q.

In-game, get early boots. If you get hit by Q, you lose. You'll eat 1.5 to 2.0 of her AP, on top of good base damages, and there are few ways to outtrade that. Having dodge Q, harass her while it is down - it has a 12 second cooldown early, remember that. Also, don't let yourself get egg-baited - Anivias LOVE to do that, especially if they take Ignite.

Assassins tend to do well, long range champions as well. Mobility works wonders considering a lot of her power is in her slow moving stun ball and her AOE ult slow. If you can dodge those, you're fairly set.

Ekko and zed wreck her

Push her pre 6 and harass her as much before then. Mobility is great against her or long range champs like xerath or lux work amazing