v2 Here: https://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/yIVjPNOG-item-concepts-keystone-concept-compendium-v2-lets-try-this-again-3-items-and-1-keystone

I'm refurbishing some of my older item concepts and putting them into a single post. I'm preparing them for a speedster champion concept that combines two of my older champion concepts into one, and bundles these item concepts with the champion. Ghostwalkers and Netherstride Grimoire were in the game previously, these are rework ideas on how they could return in Summoner's Rift.

https://66.media.tumblr.com/d58a531cfdc41e3bbbda8ea972e1009a/4801f27e5c54d97e-ea/s250x400/742270a84536a4d2cae93a74ea04ccf7977c147f.png Item Compendium

Comments and criticism is appreciated. :)

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https://vignette.wikia.nocookie.net/leagueoflegends/images/6/60/Ghostwalkers_item.png/revision/latest?cb=20180517220600 Ghostwalkers

(300) + 600 Gold Total 900 Gold

Limited to 1 pair of boots.

UNIQUE Passive - Enhanced Movement: +45 Movement Speed

UNIQUE Active - Ghost Stride: Grants +20% Movement Speed and the ability to move through units for 6 seconds (45 second cooldown). The Movement Speed bonus is doubled if you have more than one Ghost Stride item.

https://vignette.wikia.nocookie.net/leagueoflegends/images/4/41/Youmuu%27s_Ghostblade_item.png/revision/latest?cb=20171222002403 Youmuu's Ghostblade

This item's active gains the name Ghost Stride.

https://vignette.wikia.nocookie.net/leagueoflegends/images/2/29/Predator_rune.png/revision/latest/scale-to-width-down/64?cb=20171126181955 Predator (Rune)

New paragraph of text: Disables Ghost Stride on Ghostwalkers and replaces it with a passive effect. UNIQUE Passive: Reduces Predator's base cooldown by 15%, and grants ghosting while it's active.

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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: 5% of the damage you deal to towers, inhibitors and epic monsters is dealt again as bonus magic damage.

UNIQUE Passive: Champion kills, and tower, inhibitor and epic monster takedowns grant 30% decaying Movement Speed for 2 seconds.

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https://66.media.tumblr.com/8a4028c299774bbfc580803ca1b7cb60/f04adf99bbaea8e3-21/s75x75_c1/2be6b4a695340a4ab1d2b284924a8ff7d030a7cd.png Ceremonial Linkblade

(1050) + (800) + 550 Gold Total 2400 Gold

+40 Magic Resist +50% Base Mana Regen +10% Cooldown Reduction +250 Mana

UNIQUE Active - Ceremony: Designate an allied champion as your Link.

UNIQUE Passive - Spellblade: After using an ability, the next basic attack deals 75% Base Attack Damage (+5 per 25% Base Mana Regen you have) bonus magic damage on hit, granting you 15 Movement Speed for 3 seconds, and marking the unit or structure for 6 seconds, causing it to take 6% more damage from your Link (1.5 second cooldown). Marking a new target causes your previous mark to disappear.

Technical Notes:

• The mark does not stack with other players' marks.

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Changelog

Dec 23, 2019.

• Thanks to Akashi Bot and Chubby Platypus for pointing it out, Ghostwalkers and Predator are very similar. So Predator now disables Ghost Stride, and Ghostwalkers while having Predator reduces its base cooldown by 15% and grants ghosting.
• Thanks to Reksee who pointed it out, although Netherstride Grimoire's movement speed on kill decays, 3 seconds can still be lengthy for some champions who synergize well with it. So it was reduced to 2 seconds as suggested.

Dec 22, 2019.

• Netherstride Grimoire gives 7% MS instead of 5%.
• Netherstride Grimoire: UNIQUE Passive - Spectral Waltz: Damaging spells and abilities against champions grant ghosting and 7% Movement Speed for 2 seconds. Champion kills, and tower, inhibitor and epic monster takedowns grant 14% Movement Speed instead. UNIQUE Passive: Champion kills, and tower, inhibitor and epic monster takedowns grant 30% decaying Movement Speed for 3 seconds.