User blog comment:Ysana/Champion Concept- Frederica, the Girl in the Portrait/@comment-5296049-20120824170150/@comment-26567405-20120824230832

(It still derives from Attack Damage)

The basic attack is just basic attack, but magic damage instead of physical damage. It is calculated by armor as well. There's no damage boost from AP at all.

I guess it is too wide...

That suggestion is actually pretty nice.