Too everyone who commented all those years ago this guide has been updated! I am a better player now and would love feedback!

Flat ap runes? Downrated. You outdo them by lvl 6 with ap/lvl runes.

Also to reply to kkde, The increase in mana is the unique passive not the stacking of increase ap for mana, so when you have 3 you get 9% ap increase based off mana

Also to reply to kkde, The increase in mana is the unique passive not the stacking of increase ap for mana, so when you have 3 you get 9% ap increase based off mana

This is a generic ap guide, not just for cassiopeia, The reason I made this guide to have people try champs with a simple guide to remember and can change things if they need to. This is the build I use for most of my ap champs, but for champs like Lux, I would drop Sorcs boots and an archangels for CD boots and a void staff. SO this guide is mainly used to not flipping back and forward between game and guide, cause its super easy to remember. That being said thanks for the feedback.

Should keep the catalyst til mid teens at least. One of the best laning items in game. RoA upgrade cost and gains is roughly equivilent to buying 2 blasting wands and the laning staying power of a catalyst outweighs any gains from the RoA. upgrade to a banshees at leisure since youll NEED survivability ofsome kind, which this build severely lacks.

Agreed with above post. Archangel's Staff is fairly useless on Cassiopeia. She needs mana regen, not a bigger mana pool to spam indefinitely.

Meki Pendant is her best friend. Deathfire Grasp is therefore a great alternative, and should do about 50% damage off an opponents current HP (with enough AP, and 30 penetration - Greater Mark of Magic Penetration Greater Quintessence of Magic Penetration Sorcerer's Shoes = WIN)

Also, you need Rylai's Crystal Scepter for that 15% slow on Twin Fang (champions will never escape). And it gives 500 hp. With some spellvamp (think sustained damage, not burst damage), she should rock socks whatever else you choose. Will of the Ancients

Stacking Archangel's Staff with no armor, magic resistance, health regen, or spellvamp seems like you are just buying a little more burst (over Rabadon's Deathcap), which is counterintuitive to having a bigger (gigantic) mana pool, especially considering Deadly Cadence makes your burst 50% cheaper. Besides I believe the Unique Passive does not stack (I might be wrong not sure)

Cass isn't mana dependent - never in this life.
She can solo golem at lv 3 and mana issues are gone. That's why 3 Archangel's Staff isn't too good on her.

You want survivability? Damn mate, you're doing it wrong 'cause I don't see anything in the item build. Rod of Ages? Yeah, sure, but for survivability you will also want to get Abyssal Mask and Zhonya's Hourglass.

ALSO something very important on Cassiopeia: you have a lot of AoE, so you might want Rylai's Crystal Scepter too, to slow everyone even more.

This AoE stuff brings me to the last topic: Cassiopeia is a champion that gets LOTS of assists and kills. In a team fight, if you lay your Miasma on the ground, just leave it there and all the enemies die, you get 5 ***its.
With that said, I think Cassiopeia is more than just a candidate for getting Mejai's Soulstealer, it should really be one of her core items.

Have to say used the guide at level 15 and so far it's been working out really well. Thanks again! +1

Thanks guys! :D

omg amazing build, love You man :*

very nice guide used it and raped +1 :D