ARAM Mayhem kills the Trait system in Patch 26.12 and replaces it with Ability and Quest Augments. Here is what changes and why.

ARAM Mayhem leans into the chaos. Image: Riot Games
ARAM Mayhem gets its biggest shake-up since launch, and Riot is not being shy about it. The Trait system disappears in Patch 26.12. A new wave of Augments takes its place, built around a single idea: make your champion feel like your champion, not like a Trait delivery system.
If you have been grinding the Bridge all season, this changes how builds come together. What is leaving, what is arriving, and why Riot pulled the trigger, in that order.
Riot introduced Traits this past season, and on paper they did their job. They added depth to Augment selection, helped players find rare combos, and gave newer players a way to build something strong without deep mode knowledge.
In practice, a few problems crept in. Riot listed them honestly in the Augmentmaxxing dev blog. Builds homogenized, because different Augments in the same Trait set produced nearly identical playstyles. Whole games started feeling samey. With so many Augments feeding the same Trait, at least one of the ten players usually rolled into the same effect. Worst of all, Traits outshone the champions themselves. You picked an Augment for its Trait bonus, not because it made your champion more fun.
Riot calls Mayhem a champion-first mode, and Traits quietly undermined that. So they are phasing them out. The popular ones do not vanish entirely, though. Riot is folding fan favorites back in as standalone Augments. Stackasaurus is the example they gave. Instead of needing two Augments to complete the bonus, the standalone version unlocks your stack-scaling right away.
The replacement is a bigger, more flavorful Augment pool, and there are two new classes worth knowing.
First, Ability Augments. These supercharge a single ability on your champion, often turning it into something completely different. Riot’s examples sell it well. Multishot fires extra spell bolts at up to two enemies in front of you on ability cast. Slap it on Lux’s Q and you snare the whole enemy team in one Light Binding. Chain Reaction punishes knockups. Knock an enemy into another enemy and both get launched and take damage. Knock them into terrain and the airtime and damage climb even higher. The dev team also floated Blitzcrank hooking multiple people at once, which is exactly the kind of chaos this mode is for.
Second, Quest Augments. These give you a goal that pays off as the game goes. Quest: Tooth Fairy makes enemies drop a tooth when you burst them in a short window, granting Lethality and Magic Pen per tooth. Quest: Support Main rewards healing and shielding allies with bonus Health Regen, scaled off your heal or shield value. Riot cheekily pitched it as not needing Warmog’s when you have a good support around.
This is the bit I respect. Riot got ahead of the obvious complaint and admitted straight up that some of these are not balanced, and that they are fine with it.
Their philosophy for Mayhem treats balance as a means to fun, not a strict state to defend. They still hold a few fairness lines. Every champion should have a strong build to chase. No champion should always hit it. And a strong build should not auto-win or auto-lose the game on its own. Within those guardrails, they would rather rotate out the broken Augments and add new ones than nerf numbers constantly. They want to avoid the cycle where the strongest thing gets nerfed every single patch.
That is a different mindset from Summoner’s Rift, and for a chaos mode it is the right call. The same Dev Update also revealed the new champion Locke and the MSI Daejeon dates. I covered both in our Dev Update roundup.
I am a little sad to see Traits go, because the combo-hunting was fun when it hit. But Riot’s read is correct. When a system makes ten different builds feel like the same build, it has stopped doing its job.
Ability Augments are the exciting part. Turning Lux’s Q into a team-wide snare, or Blitzcrank into a multi-hook nightmare, is the kind of nonsense people boot up Mayhem for. If Riot keeps the rotation fresh and the genuinely game-breaking stuff on a short leash, this should keep the mode feeling like a blank canvas.