Archmage
From MayhemCasting an ability refunds 30% of its cooldown to another randomly selected ability.
Arena update · Patch 26.19
Loading patch details and champion and Augment artwork…
Arena update · Patch 26.19
New Augments and Guests of Honor, followed by the champion and Augment tuning in this Arena patch. The categories below are Arena Legacy's summary of Riot's official notes.
13
Augments in Arena
3
New Guests of Honor
17
Champions tuned
6
Augments adjusted
Major additions
Eleven Augments move over from ARAM Mayhem, alongside two created for Arena, plus Ivern, Senna and Thresh as Guests of Honor.
Casting an ability refunds 30% of its cooldown to another randomly selected ability.
Gain Ability Haste equal to 40% of your Critical Strike Chance.
Challenge an enemy in the Death Realm; a max-rank takedown grants your team another revive.
Pick up hot dogs to breathe fire; the effect can hit allies and explodes in stacks when you die.
Build combat stacks to unlock a powerful resurrection and a short damage, speed and Omnivamp boost.
Entering brush restores health over 1.5 seconds, with healing based partly on missing health.
A takedown leaves an Essence you can consume to blink, heal, gain speed and refresh basic abilities.
Fatal damage starts a mobile zombie state that ends with a damaging shark chomp.
Automatically alternate between a healing and shielding pulse and a movement-speed song.
Your ultimate creates a zone that grants Ability Haste and movement speed and adds damage missiles.
Dealing and taking champion damage builds stacks for Adaptive Force, defenses, size and Tenacity.
Gain Omnivamp based on your Ability Power.
Move faster toward nearby allies and improve healing and shielding based on their missing health.

When your team loses a round, brush appears at each teammate's location for the rest of the game.

Three portals connect the arena to the Death Realm; players can enter and return through them.

While downed, Thresh periodically throws a lantern that shields nearby allies and can pull them to him.
Balance updates
Arena balance adjustments are grouped by champion, Augment and system. Buff and nerf labels summarize the direction of the listed changes.

Health growth 102 → 114, Attack Damage growth 2.3 → 3.3, and movement speed 325 → 330.

Chimes needed per Traveler's Call upgrade 4 → 3.

Royal Maelstrom effectiveness 12–24 → 8–16; Endless Banquet bonus AD ratio 3 → 1.

Blunt Force Trauma minimum-health ratio 5 → 4; passive health ratio 2–3.2 → 1.5–2.7.

Cocoon cooldown 12/11.5/11/10.5/10 → 8/7.5/7/6.5/6 seconds; Skittering Frenzy 12 → 10 seconds.

Mystic Shot cooldown refund 1.5 → 2.5.

Safeguard Ability Power ratio 80% → 120%.

Dream-Laden Bough percentage maximum-health damage 4% → 3%.

Silver Stake minimum and maximum damage increase; Purgatory percentage per stack 0.5 → 1.

Blooming Burst secondary-hit Ability Power ratio 25% → 50%.

Living Forge stat discount 100 → 75 and Legendary discount 200 → 150.

Powerball cooldown 11/9.5/8/6.5/5 → 12/10.5/9/7.5/6 seconds.

Break The Mold stat steal 3–15% → 2–10%.

Glory in Death stacks per round 133 → 111.

Phenomenal Evil Power stacks per round 12 → 10; Event Horizon cooldown 23/21.75/20.5/19.25/18 → 24/23/22/21/20 seconds.

Razor Shuriken bonus AD ratio 110% → 100%; Living Shadow cooldown increases.

Burst Fire AD ratio 102–110% → 107–115%; Spark Surge refund 0.75 → 1.
Health scaling ratio 350 → 450.
Rarity changes from Prismatic to Gold.
Damage bonus is reduced by 5 at each of the three ranks.
Base health scaling 15 → 25.
Gold reward 500 → 1,000.
Cooldown 15 → 10 seconds and base damage 100 → 150.
Maximum bonus energy regeneration from missing health increases from 100% to 400%.
Arena Legacy's summary is organized from Riot's published Patch 26.19 notes. Champion and Augment artwork is loaded from the static League catalogues.