This substance from the Freljord cannot be wielded by non-Iceborne
True Ice
Viego's lore revolves around his dead wife, whose tragic passing drove him to turn the Blessed Isles into the Shadow Isles, in an event known as The Ruination.
Isolde
Jack in the Box
Thresh
Jinx
Twitch
Shaco
Gangplank
Shaco W

This Kunai Wielding Assassin and this Supportive Minotaur from the lands surrounding Noxus.
AkAlistar
After cleaning up bugs where Syndra and Poppy could carry Baron Nashor or Dragon all the way to the fountain, what one champion can still displace Epic Monsters.
Bard (R - Tempered Fate)
Jax and Zilean originally came from this city ruined by the void where most of the void champions have entered Runeterra from.
Icathia
The first character to debut in TFT who wasn't a champion in the main game. Maybe they were considered important enough in the lore to get in, or maybe Arcane was so popular they let them in anyway.
Love Tap
Miss Fortune
Nidalee
Ahri
Evelynn
Seraphine
Miss Fortune Passive

Getting five kills in quick succession; Getting the final blow on an opponent when your teammate put in more effort
PentaKill Steal / PentaKill Stealing
Anivia and Gnar can use their passives to change their in-game chat names to Eggnivia and Mega Gnar respectively, but which champion can change the in-game chat name of your opponent?
Lulu (W - Polymorph -> Harmless Critter)
Carrying the last trace of an ancient, royal bloodline in their veins, this champion was betrayed by Cassiopeia in a Shuriman tomb, and their spilled blood awoke the spirit of their ancestor, Azir.
Sivir
Norra
Tantrum
Tryndamere
Gnar
Gragas
Dr. Mundo
Amumu
Amumu E

An Item to power up crits; An Item to shield assassins from spells
Infinity Edge of Night
Who is the only champion in League of Legends with no AOE abilities in their kit whatsover?
Vayne
The Watchers
Not dead, but in a Lunari Temple hidden in the Spirit Realm, Aphelios' twin sister is able to provide him with his 5 spirit weapons.
Alune
Cyclone
Xin Zhao
Janna
Wukong
Galio
Yasuo
Wukong R

An Energized Marksman Item at Long-Range; Gangplank’s Ultimate Ability
Rapid FireCannon Barrage
At the end of a game where you finish the match with no deaths and good performance with this item in your inventory, you will occasionally see a message at the end of the game "(item name) deems (user's summoner name) worthy and has absorbed their power!!" and then it kills them, playing their death animation. No worries though, it doesn't affect your KDA.
Jak'Sho, The Protean
In 2010, Riot announced a new champion, but we never got to see them in action. Before they could be released, they were eaten by Warwick first. They even made a skin about it!
Urf the Manatee
Binding Eclipse
Aurelion Sol
Diana
Varus
Aphelios
Leona
Aphelios Q (Gravitum)

Urgot's Ultimate Ability; Pyke's Ultimate Ability
Fear beyond Death from Below
A basic attack that is not interruptible is classified as having an uncancellable windup. Commonly known as Bluetooth autos, basic attacks with uncancellable windups are only stopped by death, polymorph, untargetability, and 1 specific champion's E ability.
Quinn (E - Vault)