General
- Sion's dance references Chris Farley's audition for the Chippendales.
- A side-by-side comparison can be seen here.
- Sion was one of the first six champions designed (along with
Annie, 
Lee Sin, 
Singed, 
Sivir, and Twisted Fate)[1][2] - Soul Furnace, Traveler's Call, Mark of the Kindred, Siphoning Strike, Phenomenal Evil Power and Damnation are the only in-game abilities that can theoretically increase a stat infinitely.
- Unstoppable Onslaught was inspired by Juggernaut from X-Men.[3]
- With Unstoppable Onslaught Sion is one of a few champions who can apply crowd control on themselves (the others being Blitzcrank, Caitlyn, Galio, Graves, Kled, Lissandra, Poppy, Rammus, Rumble, Tahm Kench, Varus, Vi, Xerath, and Ziggs)
- Glory in Death is one of three abilities which allow their casters to continue attacking after death, the others being Death Defied and Icathian Surprise.
- His name comes from Hebrew צִיּוֹן ṣiyyon, the holy mountain in Jerusalem where stood the First and Second Jewish Temples, from either Hebrew צִיָּה ṣiyyah ('dry land') or Hurrian šeya ('brook, river').
Quotes
- He and Garen share the quote "Charge!"
- "So, uh, Urgot. We can't hang out any more. I'm cool now" references his own relaunch.
- "Even death trembles before me" resembles "Even death trembles in my presence".
- "I'll be back" references Terminator.
- "I feel no pain!" references his old passive.
- "It's murdering time!" references Thing from Fantastic Four by Marvel Comics ("It's clobbering time!")
- "I! Am! War!" references Groot from Marvel Comics ("I! Am! Groot!")
- "Yes... I like this weapon... " references Heavy from Team Fortress 2.
- He and Viktor share the quote "Function over form".
- "Roll out - and over!", "Change shapers mecha incognito", and "Death is the right of all sentient beings" reference Transformers.
- "I'll be ba- un- atn- ! Sorry... I'll be back" references Terminator.
- His quote "Peace, in my time." references a quote by Ultron from the movie Avengers: Age of Ultron "Peace in our time".
Skins
- He is trampling Helmet Bro.
- This is the first splash were a champion is seen from someone/something else's perspective, this is later seen in the following splashes: Captain Gangplank, Elderwood LeBlanc, Leopard Nidalee, Program Soraka and Butcher Urgot.
- This is the first splash were a champion is seen from someone/something else's perspective, this is later seen in the following splashes:
- He resembles Garrosh Hellscream from Warcraft.
- He might be referencing Darth Sion from Star Wars.
- He has Jarvan I's crown bolted to his jaw. The knife stuck on his head, on the other hand, was coated with Jarvan IV's blood so as to restore his mind during Vladimir's blood ritual.[4]
- He references Terminator.
- He shares this theme with Hextech Anivia, Hextech Annie, Hextech Galio, Hextech Janna, and Hextech Singed.
- He references Conan the Barbarian.
- He might referencing Pacific Rim and/or Transformers.
- "The pinnacle of your ' Glorious Evolution' stands before you, Viktor. Are you not pleased?" implies it was the Machine Herald who corrupted his programming in order to gain another addition to his Battlecast army.
- He shares this theme with Mecha Aatrox, Mecha Kha'Zix, and Mecha Malphite.
Relations
- In life, Sion was the first Hand of Noxus, right-hand man to Boram Darkwill and his most trusted supporter.
- His death after killing Jarvan I made Boram paranoid and had him look for ways to resurrecting him. The Black Rose offered to provide the means to do so.
- Sion's body was restored, but his mind was gone and he was reduced to a simple killing machine that turned on Noxian troops more than once. Boram locked him up in his memorial and ordered everyone to stay clear of it without his authorization.
- His death after killing Jarvan I made Boram paranoid and had him look for ways to resurrecting him.
- Once Swain overthrew Boram Darkwill with the help of the Black Rose (thus becoming the new Grand General) he learned of Sion's existence and plotted to use him as his own weapon.
- Vladimir conducted the blood ritual that restored Sion's mind (using a ritual knife coated in Jarvan IV's blood, likely obtained when the Exemplar was captured and LeBlanc impersonated him to avoid Demacia's suspicion)
- As a result of this 're-resurrection' Sion is stuck in an amnesiac limbo. He remembers Boram warning him about ravens, but his undeath clouds his thoughts and makes him over-revel in slaughter.
- As a result of this 're-resurrection' Sion is stuck in an amnesiac limbo. He remembers Boram warning him about
- Sion remembers fighting Galio in life, making them contemporaries.
