A new take on Netherstride Grimoire

https://media.lolusercontent.com/api/embedly/1/image/resize?url=https%3A%2F%2Fvignette.wikia.nocookie.net%2Fleagueoflegends%2Fimages%2F4%2F40%2FNetherstride_Grimoire_item.png%2Frevision%2Flatest%3Fcb%3D20171201214140&key=a45e967db0914c7fb472fd4381e6c85b&width=425 Netherstride Grimoire

(900) + (850) + 650 Gold Total 2400 Gold

+70 Ability Power +7% Movement Speed +10% Cooldown Reduction

UNIQUE Passive - Razing: Your damage against turrets and epic monsters is increased by 10%.

UNIQUE Passive - Malice: Gain 30% Movement Speed that decays over 3 seconds immediately after casting your Ultimate (or finish channeling it), or take down a turret or epic monster.

This item concept uses Nimbus Cloak, so we can replace it this:

https://media.lolusercontent.com/api/embedly/1/image/resize?url=https%3A%2F%2Fvignette.wikia.nocookie.net%2Fleagueoflegends%2Fimages%2Fe%2Fea%2FNimbus_Cloak_rune.png%2Frevision%2Flatest%2Fscale-to-width-down%2F36%3Fcb%3D20180509080342&key=f0abbd34f14549f3a15cd94dd9970851&width=425 Polar Shift

Your damaging abilities against enemy champions debuffs them for 2.5 seconds, reducing their movement speed by 10%. Ally champions who attack debuffed enemies gain 5% movement speed for 2.5 seconds, but can only benefit once. Cooldown: 15 seconds