NEXT OP STOLEN MIDLANER - Anivia support guide and full diamond game
You may have seen it popping up occasionally when anivia is not banned right now (approaching 9% of her overall pick rate) but as well as being strong midlane anivia is crazy good as a support right now.
I am not going to go into many anivia specific tops here like wall placement but highlight why she is now a good support. Previous to this patch a few dedicated anivia players already played her in the role to mixed success (up to grandmaster in some cases) but I always wrote it off as a love of anivia getting those ranks despite not because of the pick.
Anivia however in 10.25 had three big changes for support, her other good highlights such as crazy damage and teamfight zone control are not changed so I will not cover them as much.
Q speed, q go zoooooooooooooooom. It is now a pick tool you cannot dodge with base movement speed and accurate placement, turning an unreliable missile that you needed to work with wall/slows into a free thrown one shot nuke. Anivia q-e combo will almost guarantee kills or flashes in early laning.
Auto attack speed - Anivia previously had such a bad auto attack the wind up was slow to the point of rooting yourself as a target for skillshots especially in botlane.
Mana reliance changes, not quite only in 10.25 but anivia can now function in the support role without a mana item like roa or tear, trying to get these on a support budget was always somewhat trolling. With POM and imperial mandate you face little mana issues outside of over use of ult. Anivia support does not need to wave clear, anivia mid was given a load of compensation to work around worse mana items that support anivia never needed anyway.
For build and runes it is fairly flexible but you want to go mandate and take electrocute with POM secondary, rest are personal preference.
For the future on anivia support be careful to watch how riot nerfs her, the biggest changes on q speed and auto speed they are unlikely to change, leaving anivia in a good spot for support still.
I have made a video below summarising the above points as well as showing off a full example game in d3, I have been having decent success with the pick so far especially given I only recently picked the champ up.