I was playing Summoners Rift..
and i like to check builds with bots (I dont like to mess other games because of my new builds)
Then i build this:

Sorcerer Boots
Nashors Tooth
Rabadon DeathCap
Lich Bane
Zhonya's Hourglass
and i was checking AttackSpeed items for Diana(Wit's End,Malady,Guinsoo Rageblade)

I had like 700Ap + Elixir's+Runes+Masteries
I faced a Garen Bot very tanky..
In the fight...
Lich Bane Passive turned on when my Passive started to glow..
I hit Garen bot with almost 690 Attack Damage(Passive from Lich Bane) + 710 Mag Dmg(From my passive).. (290+60%Ap)
plus all my abilities.. Q,W,E.R
It was a insta-kill for Garen Bot..

This is broken.. you can one shot a squishy target with Q+R(Broken Passive with Lich Bane)...(And yes.. i one shoted Sivir bot with the same thing..)
I think its like "luck" if you get your lich bane proc with your passive..
Or maybe that's what makes Diana a strong..

sometimes fighter champs are bursty. Its nothing to worry about. Being squishy is something one must deal with

But amazes me how much damage you can do in one basic attack...

you were obviously a fed dps, he is a tank , end game you are suposed to kill him

Lichbane is being reworked on PTR

if you build everything around 1 skill, yeah its gonna be crazy, like varus with 700 ap is stupid strong, 3 attacks and any 1 spell will do like 60% MAX HP, thats like a fed eve using DFG then ulting, and he can just 3 more attacks, the other spell, another 60%...boom dead, and still has his ult, which is gonna hit for close to 1000 at that level of ap...but if you build this hes missing a lot of other potential

that diana will be a lot easire to kill than my tanky diana, its all balanced in the end

...You had 700 Ap. sona would be an overpowered ap mage with that much ap.

Much less a fighter like diana.

Plus, you're playing bot games. don't expect to get that fed in normals ;p