Origins

Academy

Academics have bonus Attack Damage and Ability Power. They also learn from their allies, gaining an additional bonus whenever an ally casts their Ability.
(2) 18 Attack Damage and Ability Power; 3 from allies' casts
(4) 40 Attack Damage and Ability Power; 5 from allies' casts
(6) 50 Attack Damage and Ability Power; 10 from allies' casts
(8) 70 Attack Damage and Ability Power; 15 from allies' casts

Chemtech

After dropping below 75% Health, Chemtech champions become chem-powered, gaining Attack Speed, 25% damage reduction, and regenerating a percentage of their maximum Health each second for 8 seconds.
(3) 25% Attack Speed, 3% Health
(5) 50% Attack Speed, 4% Health
(7) 80% Attack Speed, 7% Health
(9) 125% Attack Speed, 12% Health

Clockwork

Your team has increased Attack Speed, with an additional increase per augment in the Hexcore.
(2) 10% Attack Speed + 5% per augment
(4) 35% Attack Speed + 10% per augment
(6) 70% Attack Speed + 15% per augment

Cuddly

At the start of combat, Yuumi attaches herself to the nearest ally, or to the lowest Health ally after being unattached for 2 seconds. Attaching to an ally grants them a shield equal to 60% of Yuumi's maximum Health. Yuumi detaches if the shield breaks.
While attached, Yuumi is untargetable and cannot attack, but gains 5 Mana per second, and 10 Mana whenever the ally attacks.

Enforcer

Enforcers stun enemies at the start of combat. They break free after 5 seconds, or after losing 40% of their maximum Health. Enforcers will not try to stun enemies who are immune to crowd control effects.
(2) The enemy who has the most Health
(4) And the enemy who dealt the most damage last combat

Glutton

An ally can be fed to Tahm Kench once per planning phase, permanently granting him either Ability Power, Health, Armor, or Magic Resist.
To feed, hold an ally over Tahm Kench until his mouth opens, then release.

Imperial

At the start of combat, the Imperial who dealt the most damage last combat becomes the Tyrant. The Tyrant deals bonus damage. When the Tyrant dies, the Imperial who has dealt the most damage this combat becomes the new Tyrant.
(3) The Tyrant deals 75% bonus damage
(5) The Tyrant deals 150% bonus damage and the other Imperials deal 50% bonus damage

Mercenary

Gain a treasure chest that opens when you win combat against a player. At the start of each planning phase vs a player, dice rolls add loot to the chest. The longer you've gone without opening the chest, the luckier the dice.
(3) Roll 2 dice
(5) The dice are even luckier!
(7) Upon winning, roll a 3rd die that grants bonus loot.

Mutant

Mutants gain a different Trait bonus from game to game.
Cybernetic Enhancement grants bonus stats to Mutants with at least 1 item.
Voracious Appetite strengthens Mutants on each ally's death.
Voidborne executes targets below a Health threshold and deals true damage.
Hyper-Adrenal Glands give a chance for Mutants to deal additional attacks.
Synaptic Web reduces the Mana cost of Mutants' Abilities.
Bio-Leeching grants Omnivamp (healing for a percentage of damage dealt) to your team.
Metamorphosis grants stacking bonuses to Mutants at regular intervals.

Scrap

At the start of combat, components held by Scrap champions turn into full items for the rest of combat. Also, your team gains a shield for each component equipped by your team, including those that are part of a full item.
(2) 1 component, 20 shield
(4) 3 components, 35 shield
(6) All components, 60 shield

Sister

(2) Sisters gain empowered skills to compete with each other.
Vi's Ability range increases by 2 hexes.
Jinx gains 40% Attack Speed for 3 seconds after scoring a takedown.

Socialite

Socialites reveal a spotlight on the battlefield. The unit standing in the spotlight at the start of combat gains unique bonuses.
(1) 20% bonus damage
(2) and 5 Mana per second
(3) and heal for 30% of all damage they deal

Syndicate

Certain allies are cloaked in shadows, gaining 60 Armor, 60 Magic Resist and 20% Omnivamp (healing for a percentage of all damage dealt.)
(3) The Syndicate champion with the lowest percent Health
(5) All Syndicate champions
(7) Your whole team, and the effects are increased by 33%

Yordle

(3) After each player combat, a random Yordle is added to your bench for free.
(6) And Yordles' Abilities cost 20% less to cast.

Classes

Arcanist

Arcanists increase the Ability Power of your team.
(2) Your team gains 20 Ability Power
(4) Your team gains 20 Ability Power, Arcanists gain an additional 40
(6) Your team gains 50 Ability Power, Arcanists gain an additional 50
(8) Your team gains 145 Ability Power

Assassin

Innate: When combat starts, Assassins leap to the enemy backline.
Assassins' Abilities can critically strike and they gain bonus Critical Strike Chance and bonus Critical Strike Damage.
(2) +10% Crit Chance and +20% Crit Damage
(4) +30% Crit Chance and +40% Crit Damage
(6) +50% Crit Chance and +60% Crit Damage

Bodyguard

Bodyguards have increased Armor. Shortly after combat begins, Bodyguards gain a Shield and taunt adjacent enemies, forcing them to attack the Bodyguard.
(2) 100 Armor, 100 Shield
(4) 200 Armor, 300 Shield
(6) 350 Armor, 600 Shield
(8) 500 Armor, 1000 Shield

Bruiser

Your team gains bonus maximum Health. Bruisers gain double the bonus.
(2) 125 Health
(4) 225 Health
(6) 400 Health
(8) 700 Health

Challenger

Challengers get bonus Attack Speed. Upon scoring a takedown, Challengers dash to a new target and double this bonus for 2.50 seconds.
(2) 30% Attack Speed
(4) 55% Attack Speed
(6) 80% Attack Speed
(8) 130% Attack Speed

Colossus

Innate: Colossi are bigger, more powerful, and immune to crowd control effects. However, each Colossus requires 2 team slots.
(2) Colossus champions take 25% less damage

Enchanter

Your team has bonus Magic Resist. Enchanters gain bonus healing and shielding.
(2) +20 Magic Resist; 25% healing and shielding
(3) +35 Magic Resist; 40% healing and shielding
(4) +50 Magic Resist; 60% healing and shielding
(5) +75 Magic Resist; 100% healing and shielding

Innovator

Innovators build a mechanical companion to join the battle. The companion receives bonus Health and Attack Damage based on allied Innovators' star levels.
(3) Mechanical Scarab
(5) Mechanical Bear
(7) Mechanical Dragon

Protector

Protectors shield themselves for 4 seconds whenever they cast an Ability. This shield doesn't stack.
(2) 20% maximum Health shield
(3) 30% maximum Health shield
(4) 40% maximum Health shield
(5) 50% maximum Health shield

Scholar

Your team gains Mana every 2 seconds.
(2) 5 Mana
(4) 10 Mana
(6) 20 Mana

Sniper

Innate: Snipers gain 1 hex Attack Range.
Snipers deal bonus damage for each hex between themselves and their target.
(2) 8% bonus damage
(4) 16% bonus damage
(6) 30% bonus damage

Transformer

Jayce adopts melee form when placed in the front 2 rows, and ranged form in the back 2 rows.

Twinshot

Twinshots gain bonus Attack Damage. When a Twinshot attacks, they have a chance to attack twice instead.
(2) 5 Attack Damage, 40% chance
(4) 40 Attack Damage, 70% chance
(6) 80 Attack Damage, 100% chance