Fiendish Codex

Increases Ability Power and Cooldown Reduction

35 Ability Power
10 Ability Haste
Builds From

Amplifying Tome Slightly increases Ability Power 435
Builds Into

Banshee's Veil Periodically blocks enemy abilities 700 Liandry's Anguish Charge up in combat to deal high damage over time, especially against durable enemies 1200 Zhonya's Hourglass Activate to become invincible but unable to take actions 50 Cosmic Drive Massive amounts of Cooldown Reduction 865