This is my Ka*R*thus Guide.

As you see, i focus mostly on Ability Powe*R*, fo*R* "Tons of Damage"

Fo*R* *R*unes I take:

Magic Penet*R*ation Ma*R*ks
Cooldown *R*eduction Seals
Ability Powe*R* pe*R* level Glyphs
and
Flat Ability Powe*R* Quintessences

This Setup allows you to deal "Tons of Damage".

Fo*R* Maste*R*ies I go 22|0|8.

Because of the Ability Powe*R* you gain from it, this Setup allows you to deal "Tons of Damage".

Fo*R* Items I take:

5 x A*R*changels's Staff, because by spamming you*R* Ultimate, you will get endless Stacks of Mana.
Which allows you to deal "Tons of Damage".

I take 1 *R*abadon's Deathcap, because it inc*R*eases you*R* Ability Powe*R* and allows you to deal "Tons of Damage".

You don't need Boots, because you should stand in the Base, spamming Ultimates, what allows you to deal "Tons of Damage".

Not much to say.

Skill the Ultimate.

This allows you to deal "Tons of Damage".

Fo*R* Summone*R* Spells, I use:

1. Su*R*ge - it gives you Ability Powe*R*, what allows you to deal "Tons of Damage".

2. *R*ally - it gives you Ability Powe*R*, what allows you to deal "Tons of Damage".

Stand in Base, wait fo*R* you*R* Ultimate to come up and spam it.

It allows you to guess what...?

Exactly, "Win the Game"!