AP
Ability Power
Boosts magic ability damage.
When you need it
Core for Mages and AP Assassins.
Item examples
Details & formulas
Rabadon's amplifies total AP by 40%.
How to counter it
Stack Magic Resist (Mercury's Treads, Force of Nature, Kaenic Rookern). Banshee's Veil blocks burst.
Champions that build it
Mages (Lux, Ahri, Lulu, Vex, Ziggs), AP assassins (Akali, Diana, Ekko).