Anivia
Bird is the Word
Lane harassment and consistent damage output.
Damaging a champion with an ability hurls a damaging comet at their location.
Hitting an enemy champion with an ability permanently increases your maximum mana by 25, up to 250 mana.
After reaching 250 bonus mana, restore 1% of your missing mana every 5 seconds.
Gain bonuses upon reaching the following levels:
Level 5: +5Ability Haste
Level 8: +5Ability Haste
Level 11: On Champion takedown, reduce the remaining cooldown of basic abilities by 20%.
Gain increasing amounts of AD or AP,
adaptive over the course of the game.
Upon reaching level 3, gain an Elixir of Avarice.
Upon reaching level 6, gain an Elixir of Force.
Upon reaching level 9, gain an Elixir of Skill.
+
18 Summoner Spell Haste
+10 Item Haste
Offense
+5 AD or 9 AP
-
Flex
+5 AD or 9 AP
Defense
+6 Armor or 8 MR (match-up)
Why Arcane Comet
Anivia's **damage almost always comes with a stun or slow**, allowing for a much more **reliable hit** rate on Arcane Comet. She is also able to reduce the cooldown of Comet quite quickly with [E] and [R].
Why Manaflow Band
Manaflow Band is a great rune on mid laners who **stack multiple mana items** (Tear, RoA etc.), providing even more mana return.
Why Transcendence
Typical choice here for mid mages. CDR is always a great stat for trading and doing more damage.
Why Gathering Storm
Anivia is a champion who can very **easily stall the game** thanks to her [R] waveclear, and thus she can get some insane AP from forcing a stalled-out game.
WhyTriple Tonic
Perfect Timing allows you to get a cheaper Zhonya's after Archangel's + RoA giving you a massive mid-game. With Cosmic Insight your **Zhonya's cooldown will be down to 96s**.
WhyCosmic Insight
Cosmic Insight provides **a lot of defensive power** in the form of Summoner Cooldown and Item Cooldown for Zhonya's/Archangel's. If you'd prefer to accelerate your mid game item power-spike you can also take Magical Footwear here.