Set 15, K.O. Coliseum, has received its fourth update! Read on to learn about all the changes that have gone live on Wednesday in Teamfight Tactics.
In a Nutshell
Patch 15.4 is here, and it's brought some big changes! Aside from the usual bundle of unit and trait changes, this patch has brought several system changes that are here for the long haul.
Champion Roles were introduced at the beginning of K.O. Coliseum, but a major change is hitting this new system already. The Assassin role has been completely removed, and all current Assassin units have been changed to Fighters. The Fighter role has also been adjusted; Fighters will no longer gain passive Omnivamp, but Attack Speed instead. Fighters across the board have received changes to stats and abilities to reflect their new influx of speed.
Additionally, Riot has decided to nerf Artifacts significantly through various avenues. Artifacts will now both be rarer and less powerful; with a couple of choice exceptions, which have received small buffs.

Image sourced from leagueoflegends.com.
Rotating Shop Arrivals

Image sourced from leagueoflegends.com.
System & Game Changes
Champion Role Changes
The most dramatic change that’s come with Patch 15.4 is the removal of the Assassin Champion Role and the reworking of the Fighter role. Champion Roles were added fresh with K.O. Coliseum, so changes like these were to be expected. Since the Assassin role is being removed, champions who are currently tagged as Assassins (Katarina, Yasuo, and Akali) have all changed into Fighters.

As for Fighters, their passive is being changed. Fighters will no longer gain Omnivamp, and instead get 5-30% Attack Speed per stage. Some fighters have had their stats modified to account for the influx of Attack Speed coming their way. The reason for this change was because the Omnivamp gave a lot of power to Fighters early on, but fell off as the game went along. It also made a lot of favoured Fighter items (Bloodthirsters and Hand of Justices) obsolete.
Prismatic & Gold Orbs
Prismatic Orbs have been causing balancing issues for a while now. The random factor would sometimes lead to a very lopsided lobby; with some players getting fantastic rewards, and others getting boons that didn’t have much of an impact. Rather than try to continue to balance around the randomness, Riot has decided it was time for Prismatic Orbs to be equalised. Going forward, every player gets the same Prismatic Orb Output. The following are possible outputs, and their likelihoods:
10% - 30 Gold
10% - 3 Component Anvils & 1 Full Item Anvil
10% - 4 Belts & 4 Reforgers
10% - 1 Greater Duplicator & 2 Lesser Duplicators
10% - 1 Artifact Anvil & 10 Gold
8% - 45 Gold
8% - 3 Full Item Anvils
8% - 1 Spatula, 1 Reforger, 3 Component Anvils
8% - 1 Rascal Gloves & 1 Thieves Gloves
5% - 1 of each base component (8 total) & Golden Remover
5% - 40 Gold & 20 Rerolls
5% - 1 Radiant Lucky Chest & 2 5-Cost Champions
1% - 1 Spatula, 1 Frying Pan, 40 Gold
1% - A tiny present
1% - A fishy reward
Additionally, Gold Orbs have been adjusted so they no longer output Artifact Anvils. Instead, Gold Orbs are now 2.5% more likely to produce Champion Duplicators and 5-Costs.
Artifact Nerfs
Artifacts have been a little too powerful and a little too plentiful in the arena. Not only were many Artifacts nerfed in Patch 15.4, and not only have Gold Orbs been bereft of their Anvil rewards, but the Loot Subscription Opening Encounter has been changed as well. The Artifact Anvil reward from the Loot Superscription Opening Encounter has been replaced with providing one Completed Item Anvil, and one Salvager.
Trait Changes
Origin Trait Changes
▲ BUFF | ▼ NERF | ▶ ADJUSTMENT | ✶ NEW
BATTLE ACADEMIA |
| ▶ CRYSTAL GAMBIT |
| ▶ LUCHADOR |

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| Crystal Gambit (3) Base Gems Per Loss: 13 ⇒ 15 Crystal Gambit (3) Stage 4 Multiplier: 1.85 ⇒ 1.65
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| Luchador No longer grants Immunity and Untargetability before jumping. Champions will heal before damage is dealt, allowing them to survive if they would outheal the damage. Champions no longer run backwards before leaping.
Luchador Heal: 15/35% ⇒ 25/50% max health |
MENTOR |
| ▲ MIGHTY MECH |
| MONSTER TRAINER |

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| Mighty Mech (7) Mech Base Health: 850 ⇒ 950 |
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SOUL FIGHTER |
| ▶ STAR GUARDIAN |
| SUPREME CELLS |

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| Star Guardian Individuals Bonuses:
Rell Shield: 200 ⇒ 240 Syndra AP: 5 ⇒ 6 Xayah: 50 + 60 per stage ⇒ 60 + 75 per stage Ahri: Unchanged Neeko: 10% Heal and Shield ⇒ 12% Heal and Shield Poppy: 15% Heal ⇒ 18% Heal Jinx: 7% AS, 20% on takedown ⇒ 8% AS, 25% on takedown Seraphine: 4% ⇒ 5%
Star Guardian Bonus Per Tier:
3: 110% > 105% 4: 120% > 110% 5: 130% > 112% 6: 140% > 114% 7: 145% > 116% 8: 150% > 118% 9: 160% > 120% 10: 200% > 150% |
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THE CREW |
| ▲ WRAITH |
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| Wraith Shadow Cadence: 5s ⇒ 4s |
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ROGUE CAPTAIN |
| THE CHAMP |
| STANCE MASTER |

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Class Trait Changes
▲ BUFF | ▼ NERF | ▶ ADJUSTMENT | ✶ NEW
EXECUTIONER |
| ▲ HEAVYWEIGHT |
| JUGGERNAUT |

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| Heavyweight Health: 20/40/60% ⇒ 20/40/65% |
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▼ PRODIGY |
| ▼ PROTECTOR |
| SNIPER |

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Prodigy Teamwide Mana Regen: 1/1/2/3 ⇒ 1 at all levels |
| Protector Shield Amount: 20/40/60% ⇒ 18/36/55% |
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SORCERER |
| STRATEGIST |
| ROSEMOTHER |

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Unit Changes
TIER 1 Unit Changes
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NERFS |
| BUFFS |
MALPHITE - Health: 750 ⇒ 700 - Resist Per Item: 20 ⇒ 12 |
| SIVIR - Base AD: 45 ⇒ 50 - Mana: 0/60 ⇒ 0/50 |
ADJUSTMENTS |
| REWORK / NEW |
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TIER 2 Unit Changes
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NERFS |
| BUFFS |
KAI’SA Spell Damage: 38/57/90 AD ⇒ 36/54/84 AD |
| JANNA Spell Damage: 110/165/260 AP ⇒ 130/195/310 AP
VI Heal: 200/250/300 HP ⇒ 230/280/330 HP |
ADJUSTMENTS |
| REWORK / NEW |
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TIER 3 Unit Changes
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NERFS |
| BUFFS |
UDYR Healing: 160/200/250 AP ⇒ 130/170/220 AP |
| MALZAHAR Mana: 0/35 ⇒ 0/30
SMOLDER Damage: 215/325/515 AD ⇒ 225/340/540 AD
ZIGGS Spell Damage: 200/300/465 AP ⇒ 230/345/550 AP |
ADJUSTMENTS |
| REWORK / NEW |
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| SENNA Senna's core gameplay logic has been rewritten. She's now more responsive in ending her spell if no valid targets are within her beam. She is also now able to attack and move significantly earlier after the spell ends.
- Spell Damage: 385/580/960 AD ⇒ 360/540/875 AD |
TIER 4 Unit Changes
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NERFS |
| BUFFS |
K’SANTE Spell Durability: 50/55/85% ⇒ 45/50/85%
LEONA Resist steal per potential: 1.5 ⇒ 1
RYZE - Mentor Spell Damage: 800/1200/6000 AP ⇒ 770/1155/6000 AP - Mentor Geyser Damage: 50/75/450 AP ⇒ 45/65/450 AP
YUUMI Damage Per Page: 28/42/150 AP ⇒ 24/36/150 AP |
| SAMIRA Single Target Damage: 80/120/650 AD ⇒ 105/160/650 AD |
ADJUSTMENTS |
| REWORK / NEW |
POPPY - Shield: 500/575/1200 AP ⇒ 280/330/900 AP + 10% max HP - Primary Damage: 200/300/3000 AD + 10% HP ⇒ 250/375/4000 AD - Secondary Damage: 60/90/1000 AD + 5% HP ⇒ 125/200/1500 AD |
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TIER 5 Unit Changes
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NERFS |
| BUFFS |
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| TWISTED FATE - Spell Damage Base: 120/180/1500 AD ⇒ 200/300/9999 AD - Spell Damage Per Mark: 26/40/500 AP ⇒ 15/25/500 AP |
ADJUSTMENTS |
| REWORK / NEW |
ZYRA - Melee Plant Health: 1200 HP ⇒ 800 HP - Teamwide Attack Speed: 15% + 40/60% AP ⇒ 10% + 25/40% AP - Spell Damage: 80/120/999 AP ⇒ 90/135/999 AP |
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Augment Changes
▲ BUFF | ▼ NERF | ▶ ADJUSTMENT | ✶ NEW
SILVER AUGMENTS |
AUGMENT NAME | DESCRIPTION | CHANGE |
Nine Thousand Volts (Kennen) | Gain a Kennen. Your strongest Kennen becomes a ranged Marksman. He throws piercing Shurikens that can stun and deal magic damage. | ▲ Mana: 30/80 ⇒ 20/60 |
GOLD AUGMENTS |
AUGMENT NAME | DESCRIPTION | CHANGE |
Give ‘em the Chair! (Dr. Mundo) | Gain a Dr. Mundo. Your strongest Dr. Mundo becomes a Ranged Marksman. He now throws chairs that deal heavy damage, but cost Health. | ▲ Range: 3 ⇒ 4 ▲ Mana: 0/50 ⇒ 0/40 |
Space Camp | Whenever you upgrade a 1-cost Crew champion, gain a random 1-3 cost Crew Champion. | ▲ Gain a random 1-3 cost Crew Champion. |
Teacher’s Council | Mentor bonuses are granted to your team regardless of how many Mentors you play. Gain a Kobuko. | ▼ Teacher's Council no longer increases bonuses from Mentors by 10%. ▼ Teacher's Council Champion: Udyr ⇒ Kobuko |
Twilight Assault | Gain a Shen. Your strongest Shen becomes a ranged Marksman gaining +3 Range. His ability no longer shields but instead deals additional damage. | ▲ Mana: 0/60 ⇒ 0/50 ▲ Base Attack Speed: 0.7 ⇒ 0.75 |
PRISMATIC AUGMENTS |
AUGMENT NAME | DESCRIPTION | CHANGE |
Mess Hall | After 10 seconds of combat, your champions gain 20% Attack Speed and attacks also hurl delicious projectiles that deal 140% Attack Damage as magic damage. | ▶ Excluded from 2-1 |
Giant and Mighty | Your team gets larger, gaining 300 Health and +4% max Health. | ✶ Has been reenabled. |
Tiny, but Deadly | Your team is 50% smaller, but moves and attacks 30% faster. | ✶ Has been reenabled. |
Item Changes
▲ BUFF | ▼ NERF | ▶ ADJUSTMENT | ✶ NEW
MUNDANE & RADIANT ITEMS |

| ▶ Arcangel’s Staff Base AP: 20 ⇒ 30 AP Per 5 Sec: 30 ⇒ 20 |

| ▶ RADIANT Arcangel’s Staff Base AP: 60 ⇒ 55 AP Per 4s: 40 ⇒ 35 |

| ✶ BLUE BUFF Mana Regen: 6 ⇒ 5 NEW Gain 10% additional Attack Damage and Ability Power from all sources. |

| ✶ RADIANT BLUE BLUFF AD & AP: 45 ⇒ 30 NEW Gain 20% additional Attack Damage and Ability Power from all sources. |

| ▲ GIANT SLAYER Baseline Damage Amp: 10% ⇒ 15% |

| ▲ RADIANT GIANT SLAYER Baseline Damage Amp: 20% ⇒ 25% |

| ✶ KRAKEN’S FURY Attack Damage: 20% ⇒ 10% NEW Attacks grant 3% stacking Attack Damage, up to 20 attacks. After 20 attacks, gain 40% Attack Speed. |

| ✶ RADIANT KRAKEN’S FURY Attack Damage: 30 ⇒ 20 NEW Attacks grant 6% stacking Attack Damage, up to 20 attacks. After 20 attacks, gain 80% Attack Speed. |

| ✶ NASHOR’S TOOTH Ability Power: 25 ⇒ 15 Mana Regen: 2 ⇒ 0 Critical Strike Chance: 0% ⇒ 20% NEW Attacks grant 2 bonus Mana, increased to 4 if they critically strike. |

| ✶ RADIANT NASHOR’S TOOTH Ability Power: 60 ⇒ 30 Mana Regen: 4 ⇒ 0 Critical Strike Chance: 0% ⇒ 35% NEW Attacks grant 4 bonus Mana, increased to 8 if they critically strike. |

| ✶ QUICKSILVER Attack Speed: 30% ⇒ 10% NEW Grants 3% stacking Attack Speed per second. |

| ✶ RADIANT QUICKSILVER Base Attack Speed: 50% ⇒ 25% NEW Grants 6% stacking Attack Speed per second. Radiant Red Buff Attack Speed: 60% ⇒ 65% |

| ▲ RED BUFF Attack Speed: 40% ⇒ 45% |

| ▲ RADIANT RED BUFF Attack Speed: 60% ⇒ 65% |
ARTIFACTS |

| ▼ FISHBONES Attack Speed: 50% ⇒ 30% |

| ▼ FLICKERBLADES AD Per 5 Attacks: 4% ⇒ 3% AP Per 5 Attacks: 5 ⇒ 4 |

| ▲ INFINITY FORCE Health: 250 ⇒ 300 Stats: 25 ⇒ 30 |

| ▼ INNERVATING LOCKET Mana Restore: 2% ⇒ 1% |

| ▲ LICH BANE Stage 4/5/6+ Damage: 400/480/540 ⇒ 450/525/600 |

| ▼ MANAZANE Mana Restore: 120 ⇒ 100 |

| ▲ RAPID FIRECANNON Attack Speed: 66% ⇒ 75% |

| ▲ SILVERMERE DAWN AD: 110 ⇒ 120 |

| SUSPICIOUS TRENCH COAT BUG FIX Properly applies the Shadow Clone debuff to clones that split out. |
Power-Up Changes
▲ BUFF | ▼ NERF | ▶ ADJUSTMENT | ✶ NEW
✶ Shine Brighter |
| ✶ Mechablade |
| ✶ Supreme Surge |
Lux only. Every other cast, Lux's spell explodes in a 2-hex radius, and deals 10% more damage. |
| Aatrox only. Aatrox gains AS equal to 4% of his maximum health, and his attacks grant 5 bonus mana. |
| (Kennen only. Whenever an enemy is executed by a Supreme Cell, Kennen heals 15% of his missing health and gains 15 mana. |
✶ Golden Gloves |
| ✶ Veteran |
| ✶ Drift Duo |
Kobuko only. When you gain interest, gain 1.5% AD per gold collected. |
| This unit is a Mentor. They grant 4% damage amp, and their Mentor upgrade is +35 AD and +35 AP, Katarina, Xayah, and Kalista only. |
| Senna and Lucian gain +3 mana regen. If both are 3-star, gain +1 mech. |
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| ✶ Starry Knight |
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| Rell only. Rell gains 6% Health and 10 AP for every 1-cost unit you field. 3-star units count double. |
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In addition to these seven newcomers, nearly two dozen Power Ups have been buffed. Riot’s goal going forward is that players always feel like there’s at least one option, out of the three that pop up, that feels strong.