Patch 26.18 added five champions to League Classic. None of them are new, and none of them play the way you know them.
Each one runs a historical version of its kit, taken from a specific window of years. Three of those versions were removed from League permanently, because Riot decided they could not be balanced without losing what made them work in the first place.
Here is what came back, and what each version actually does.
Poppy, 2010 to 2015
The most consequential of the five.
Diplomatic Immunity made Poppy immune to every enemy except a single champion she selected. Not reduced damage, not a damage cap. Four opponents could not interact with her at all while she fought the fifth.
Her passive compounds it: any single hit above 10% of her maximum health has its damage halved. Burst does not work on her the way it works on anyone else.
Riot's own explanation for removing it was that nerfing the ability would have stripped out the thing that made it distinctive, so they took it out entirely and rebuilt the champion around a different ultimate. This version has not been playable since 2015.
Fiora, 2012 to 2015
Blade Waltz made Fiora untargetable while she dashed between nearby enemies, striking each one, and left her wherever the chain ended.
Untargetable is the operative word. Once it started there was no stun, no flash and no reliable window to stop it.
The rest of the kit supports that: she heals from damaging enemies, and Riposte parries an incoming attack outright. Modern Fiora rewards precision, hitting vitals on a single target over a longer fight. This version is built around one decisive button.

Galio, 2010 to 2017
Riot describes this Galio as one part mage, one part AP bruiser, one part tank and one part support, which is a fair summary of why he was eventually reworked. He never settled into a role.
Runic Skin converts his magic resist into ability power. Building defensively against an AP team made him hit harder, so the counter to magic damage was to stack resistance and then win the damage trade anyway.
His ultimate, Idol of Durand, taunts surrounding enemies while reducing the damage he takes during the channel.
Shyvana, 2011 to 2013
The oldest kit of the five, and the one furthest from its modern counterpart.
Her passive has basic attacks enhance her abilities, so the pattern is to weave attacks between casts rather than to unload a combo. The ultimate transforms her into dragon form, granting defensive stats and dealing area damage as she flies.
The theme survived the rework. Almost none of the mechanics did.
Xin Zhao, 2012 to 2017
The simplest of the batch, and Riot's own description is accurate: straightforward right-click-until-they-are-dead gameplay.
Three Talon Strike reduces his cooldowns as he lands hits, and the knockup is intact. There are no conditions to set up and no windows to hit. He commits and keeps going.





