As a result of the 2010 Live Streamed Match of Ionia vs Noxus, this item was added to the game.
Ionian Boots of Lucidity
Which two champions have the ability to apply the crowd control "Drowsy" to enemies?
Zoe and Lillia
Before active trinkets were implemented, this was a purchasable consumable that would reveal wards and invisible characters around you.
Oracle's Elixir
Lightbringer is also a viable answer, though it was a full item and not a consumable.
This champion canonically breaks the fourth wall, being able to sense the player's fear.
Nocturne is described in lore as being able to sense people's fear through dimensions, including the summoner/player.
Draven's Passive
The League of Draven
The Playable River
Riven
AD Fighter
Ashe
This is the name of the unique passive shared by one-hit-proc items such as Sheen, Trinity Force, Lich Bane, Iceborn Gauntlet, and Bloodsong.
Spellblade
This champion, noted as being exceptionally noble, kind, and heroic, is the only character Pyke has said is not on his kill list.
Braum
Zoe's Passive
More Sparkles!
-200 Points
I don't make the rules, I just enforce them.
Just as the ARAM map is called Howling Abyss, this is the name of the old game mode Dominion, named after the home of the Brackern like Skarner.
Crystal Scar
While there are several more abilities that grant damage-ignoring effects, or conditional invulnerability against specific targets, there are only two champions in the game that grant true invulnerability with one of their abilities. Who are they?
Taric and Kayle
This former summoner spell from early seasons of the game used to give you attack speed and ability power.
Surge
This is the reason that Trundle is king of the trolls.
He is the smartest troll.
Teemo W
Move Quick
This champion has a Pokemon emote
Skarner
This was the first champion released AFTER the official launch of the game.
Udyr
83.33%
This is the original, violent name of the summoner spell Flash, which was originally an active ability on a pair of boots.
Yordle Stompers
These two champions, whose fighting abilities each revolve around a gauntlet that grants them power, are actually wielding halves of the same pair of gauntlets that were once owned by a Shuriman Ascended.
Kassadin and Ezreal
Lillia's W
Which champion had such a terrible reception upon their reveal that their release was delayed to rework their visual design?
Lux
In their original release, this champion had a point-and-click ability that could be activated on an opponent even if they were in fog of war, though the circumstances to do so were specific.
Urgot's Q would lock onto targets hit by his E ability recently, and would be a point-and-click ability so long as you had your mouse over the correct position of the champion, even if they were invisible or in fog of war.
There are 4 champions with innate unusual attack speed patterns. (This means a consistent alternate attack speed pattern, not periodic/contextual attack speed bonuses) Who are they?
Graves, Sett, Jhin, Akshan.
Honorable mention that I'll allow is Aphelios, though his attack speed with Chakrams is because of distance, which is considered a normal attack pattern.
This was the name of Poppy's ultimate in her original design.
Diplomatic Immunity
Once upon a time, Summoners were a part of the lore of League of Legends. That is no longer the case, but there are 4 champions that still refer to you as "Summoner" in their voice lines. Who are they?
Brand - "You can't contain me, summoner!"
Miss Fortune - "Sure you can handle me, summoner?"
Cho'Gath - "Summoner, your darkness beckons."
Nocturne - "Do I scare you, summoner?"
Milio's E
Warm Hugs
Who is Jarvan IV?
Leblanc
In the 2010 Live Streamed match of Ionia vs Noxus a champion, played by streamer GuardsmanBob, singlehandedly super-carried the game for Ionia. Even though it so far hasn't been reflected in lore, one could say that this character is the very reason Ionia is a free nation.
Udyr
In his original, dodge chance-focused design, Jax's passive used to grant a stacking bonus for each item purchased. What bonus was this?
15% bonus AD/AP
This was later changed to bonus HP per AD/AP per item purchased, before being changed again to something more akin to his current attack speed stacking passive.
This character's defensive passive is called Gusto.
The melee minion
Graves' gun shares a name with the ultimate ability of another champion, what is that name?
Destiny
Old Urgot's Ultimate
Hyper-Kinetic Position Reverser
Which champion has the lowest Attack Damage at level 18?
Senna, with 50