I choose Elixir of Brilliance cause of the insane AP. And the mana potions cause i don't wanna go oom (captain obivious).

After that i choose mana regen pendantbecause i like hot sauce.

After you buy tear of the goddess YOU HAVE TO SPAM ABILITIES! cause for each ability you do you gain 4 more mana!! if you do 1 million abilities you have 4 million more mana!!! (fast ne..)

then i build saphire crystal because anivia use to build that. and anivia is a good champion!

then i go archangle staff for same reason as tear of the goddess but i also gain some AP.

and then i go rabadons for more AP

Last but not least i go for mejai's soulstealer because if you faceroll u get lots of kills.

You put your face on your keyboard and roll it around like this: ujhhyujnmnjhvbgnnbnb m,µnm

As you see you can press lots of buttons at the same time at that's the reason you get all the kills. and if u get lots of kills mejai's will get more stacks.

I use revive cause i die much

and clarity cause i want more mana!

It's kinda obivious that the ulti is the best skill, so why don't give it a point in each level? you get lots of more damage and it has almost no cooldown

YOU HAVE TO take the Blue buff so u get mana regen and cooldown reduction so u can spam ur ulti!

Pros!
You get lots of mana / mana reg

Cons!
Garens spells is free
Garen don't got mana

This is a fully serious build that every1 use in championchips!