The champion who created a substance for the Noxian invasion of Isonia that is so evil, it mentally scarred Riven into the point of quitting to fit for Noxus, razed Master Yi's entire home village, and destroyed a large portion of Karma and Irelia's defending forces.
Singed
Scurvy Deadman
Pyke
The name of the champion who's current ultimate used to be one of their basic abilities back in the very early years of League.
Twisted Fate
QR Codes, Glenn Howerton, The World's Busiest Train Station
Japan
243. Bad Blood
91. Love Story
1. All Too Well
All 243 of Taylor Swift's Songs Ranked
The name of the Champion who is canonically (as per Legends of Runeterra) a part of an illegal drug dealing Operation.
Teemo :(

Skully Chainman
Thresh
The name of the skin line with the least amount of skins in it - and how many skins there are.
Kaiju - 1
It's just crabgot. It is considered it's own skin line, though.
Jogging, Russel Crowe, they issued Hobbit-themed legal tender in the year 2012.
New Zealand.
6. "Santa Baby" by The Pussycat Dolls
5. "Grandma Got Run Over by a Reindeer" by Elmo and Patsy
1. "The Little Drummer Boy" by Jessica and Ashlee Simpson
The 20 Worst Christmas Songs of All Time
"Your god could not stop me before, sea priestess. Do not challenge me again." (Said to Illaoi)
Viego
At one point in the lore, Illaoi captured Viego in an amulet, but Gangplank stole it from her in hopes of taking Viego's power for his own... this is the plot of the Ruined King game
Kitty Punchman
Sett
The name of the champion who has had a visual update in every League of Legends game excluding League of Legends (for PC).
Malphite.

Makeup, Mena Massoud, the only still standing Wonder of the 7 Wonders of the Ancient World.
Egypt.
29. "Eazy Does it" by Eazy-e
11. "My Name is" by Eminem
1. "Nuthin' but a 'G' Thang" by Dr. Dre
The 40 Greatest Songs Produced by Dr. Dre
The champion who has the hobby of scrimshawing exclusively on live human bones - waiting for them to wake up again so they can continue.
Gangplank
Dr. Mommy Woman
Renata Glasc
When near this enemy champion, Volibear gains 1 armor. Likewise, when this champion is near an enemy Volibear, they gain 1 AP.
Zilean
This is not Lore specific, and is in fact references the fact that the Riot developer Tom 'Zileas' Cadwell, whom Zilean was named after, was opposed to Volibear's character concept
Birth Control Pills, Lupita Nyong'o, where the Meteor that Wiped out the Dinosaurs Landed.
Mexico.
100. "Video Killed the Radio Star" by the Buggles
22. "Wyclef Jean" by Young Thug
1. "Formantion" by Beyonce
The 100 Greatest Music Videos.
"Why would anyone listen to a creature so ugly?" (Said to Tahm Kench)
Jihn
This was a sort of meta joke because Tahm Kench used to have the most voice lines in game - Jihn, ironically, now has the most.
Tiny Jokeman
Shaco
This jungler holds the rarest skin in the game - the only way to obtain it was participating in the closed League of Legends beta in 2009.
King Ramus!!!

The Heart Rate Monitor, Lauri Markkanen, the First European Country to Grant Women the Right to Vote
Finland
35. "Novacane" by Frank Ocean
14. "Through the Wire" by Kanye West
1. "... Baby One More Time" by Britney Spears
The 100 Greatest Debut Singles of All Time