Dragon's Hoard
Smolder and Aurelion Sol
Controlling one of these for your team granted 10% movement speed. Two restored 1% max health on minion or monster kill.
Altar
Eye of the Storm
This epic item was re-introduced after a 9 year hiatus, even keeping it's original 1337 gold cost.
The Brutalizer
On Summoner's Rift, this champion's passive ability procs after 4 auto attacks, but on Wild Rift it can be activated and grants 2-12 gold per attack for 3 attacks.
Twisted Fate
Bad Blood
Renekton and Nasus
Twisted treeline was removed in this year - players were gifted an icon and emote based on the number of games played on the map.
2019
The Baron's Grit
Nashor's Tooth
Rift Herald
This champion's ultimate deals single target true damage on Summoner's Rift, but on Wild Rift it deals AOE damage (reduced for targets beyond the main one).
Garen
Death Defied
Tryndamere and Kindred
This Treeline-exclusive item granted Ability Power, Magic Resist, Armor, and Tenacity to its user. No item since has provided these stats.
Moonflair Spellblade
Swordnado
Voltaic Cyclesword
Hunger of the Void, a buff given to the player's team who slays the Void Grubs, requires this many stacks to summon Void Mites when a champion attacks a tower.
5
This champion's global ultimate fires in a line on Summoner's Rift, but on Wild Rift its path can be altered while in the air for better aim.
Ashe
Golden Ratio
Hwei and Jhin
Vilemaw would grant the Crest of Crushing Wrath buff to the slayer's team, which gave these two buffs to its wearers.
Ghosting and Horrify (minion fear)
T.U.R.B.O.
Experimental Hexplate
Along with the map changes, Baron can now spawn with three different types which can affect the pit - the Territorial Baron which creates a wall to divide the entrance, the Hunting Baron which leaves it unchanged, and this Baron which creates an open tunnel allowing easy entry and escape.
All-Seeing
This champion needs to target a friendly unit for his dash on Summoner's Rift, but on Wild Rift he can dash at any time (although it only grants a shield if it's to an enemy Champion).
Lee Sin
Fishing in the Lavender Sea
Bel'Veth and Jax
Before the addition of Vilemaw, this similarly named dragon-like epic monster granted a team-wide buff to his slayers.
Ebonmaw
Ataraxia
Hubris
Terminus was introduced this season with a one-of-a-kind auto attack stacking Magic Resist & Armor buff called this, which is also a term used in writing to contrast two opposing ideas.
Juxtaposition
Magic Shield