The following list describes all researches and their locations (* indicates that the research is not present in all trees).
Gold Research
Icon
Name
Description
Locations
Raining Gold
Increases all gold earnings
Firestone Tree 1- Meteorite Tree 1- Exotic Upgrade Tree 1- Alchemist Tree 1- Amulets, Achievements Tavern Luck, Cards, Artifacts Guild Tree, Personal Tree Campaign Perk Oracle blessing Scarab Level, Inscriptions, Beasts
Critical Loot Bonus
Increases the gold earnings on critical loot
Firestone Tree 1
Critical Loot Chance
Increases the chance for critical loot
Firestone Tree 1
Level up Cost
Reduces the gold cost that heroes need to level up
Meteorite Tree 1,2,4 Alchemist Tree 2,4,6,8,10,11 Personal Tree
Firestone Research
Icon
Name
Description
Locations
Prestigious
Increases the firestones you earn after every prestige
Firestone Tree 1-2 Meteorite Tree 3- Exotic Upgrade Tree 1- Personal Tree Oracle blessing Forbidden Knowledge Scarab Level, Beasts
Firestone Effect
Increases the firestone effect
Firestone Tree 3- Meteorite Tree 1- Exotic Upgrade Tree 2- Alchemist Tree 1- Tavern Cards, Artifacts Personal Tree Inscriptions
Attribute Research
Icon
Name
Description
Locations
All Main Attributes
Increases all main attributes of all heroes and guardians
Firestone Tree 2- Meteorite Tree 2- Exotic Upgrade Tree 1- Alchemist Tree 1- Amulets, Achievements Tavern Luck, Cards, Artifacts Guild Tree, Personal Tree Campaign Perk Chaos Rift League Scarab Level, Inscriptions, Beasts
Heroes All Main Attributes
Increases all main attributes of all heroes
Grace aura, Azhar aura
Attribute Damage
Increases the damage of all heroes and guardians
Firestone Tree 1- Meteorite Tree 1- Tavern Artifacts Guild Perk, Guild Tree, Personal Tree Forbidden Knowledge Beasts
Heroes' Damage
Increases the damage of all heroes
Exotic Upgrade Tree 1,5,8 Alchemist Tree 1- Tavern Cards, Artifacts Scarab Level, Inscriptions
Attribute Health
Increases the health of all heroes
Firestone Tree 1- Meteorite Tree 1- Exotic Upgrade Tree 1,5,8 Alchemist Tree 1- Tavern Cards, Artifacts Guild Perk, Guild Tree, Personal Tree Forbidden Knowledge Forbidden Knowledge Scarab Level, Inscriptions, Beasts
Attribute Armor
Increases the armor of all heroes
Firestone Tree 1- Meteorite Tree 1- Exotic Upgrade Tree 1,5,8 Alchemist Tree 1- Tavern Cards, Artifacts Guild Perk, Guild Tree, Personal Tree Forbidden Knowledge Scarab Level, Inscriptions, Beasts
Critical Chance
Increases the critical chance of heroes
Talent Tree
Critical Damage
Increases the critical damage of heroes
Talent Tree
Dodge
Increases the chance for all heroes to dodge enemy attacks
Talent Tree
Attack Speed
Increases the attack speed of all heroes
Talent Tree
Guardian Research
Icon
Name
Description
Locations
Guardian Power
Increases the damage of all guardians
Firestone Tree 1- Exotic Upgrade Tree 1- Alchemist Tree 1- Talent Tree Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Forbidden Knowledge Inscriptions
Guardian-specific researches: Tavern Cards
Hero Research
Icon
Name
Description
Locations
Rage Heroes
Increases all attributes of heroes using Rage
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 3 Alchemist Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Forbidden Knowledge Inscriptions, Beasts
Mana Heroes
Increases all attributes of heroes using Mana
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 3 Alchemist Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Forbidden Knowledge Inscriptions, Beasts
Energy Heroes
Increases all attributes of heroes using Energy
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 3 Alchemist Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Forbidden Knowledge Inscriptions, Beasts
Fist Fight
Increases all attributes of melee heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Alchemist Tree 1-* Tavern Cards Guild Tree, Personal Tree Oracle blessing Inscriptions
Precision
Increases all attributes of ranged heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Alchemist Tree 1-* Tavern Cards Guild Tree, Personal Tree Oracle blessing Inscriptions
Magic Spells
Increases all attributes of spellcaster heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Alchemist Tree 1-* Tavern Cards Guild Tree, Personal Tree Oracle blessing Inscriptions
Projectiles
Increases all attributes of ranged and spellcaster heroes
Firestone Tree 1
Tank Specialization
Increases all attributes of Tank heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Inscriptions, Beasts
Healer Specialization
Increases all attributes of Healer heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Inscriptions, Beasts
Damage Specialization
Increases all attributes of Damage heroes
Firestone Tree 1-* Meteorite Tree 1-* Exotic Upgrade Tree 1-* Tavern Cards, Artifacts Guild Tree, Personal Tree Oracle blessing Inscriptions, Beasts
Rage Regeneration
Increases the regeneration rate of Rage heroes
Tavern Artifacts
Mana Regeneration
Increases the regeneration rate of Mana heroes
Tavern Artifacts
Energy Regeneration
Increases the regeneration rate of Energy heroes
Tavern Artifacts
Hero-specific researches: Tavern Cards
Party Research
Icon
Name
Description
Locations
Leadership
Increases all main attributes of the leader
Firestone Tree 1-* Exotic Upgrade Tree 1 Talent Tree Tavern Cards, Artifacts Guild Tree Forbidden Knowledge Inscriptions
Team Bonus
Increases all main attributes of the non-leader characters
Firestone Tree 1-* Exotic Upgrade Tree 1 Talent Tree Tavern Cards, Artifacts Guild Tree Forbidden Knowledge Inscriptions
Leader - Auto Abilities
Allow your leader to perform abilities automatically
Talent Tree
Party - Auto Abilities
Allow your party members to perform abilities automatically
Talent Tree
Enemy Research
Icon
Name
Description
Locations
Weak Enemy
Reduces the health of all non-boss enemies
Firestone Tree 1-* Meteorite Tree 1,5 Alchemist Tree 1-* Talent Tree Guild Tree
Weak Boss
Reduces the health of all boss enemies
Firestone Tree 1-* Meteorite Tree 1,5 Alchemist Tree 1-* Talent Tree Guild Tree
Powerless Enemy
Reduces the damage of all non-boss enemies
Firestone Tree 1-* Meteorite Tree 4,5 Alchemist Tree 1-* Guild Tree
Powerless Boss
Reduces the damage of all boss enemies
Firestone Tree 1-* Meteorite Tree 4,5 Alchemist Tree 1-* Guild Tree
Mission Research
Icon
Name
Description
Locations
Expeditioner
Reduces duration of all map missions
Firestone Tree 1 Talent Tree, Amulets
Explorer
Increases the chance for double reward of all map missions
Ancient Artifacts Guild Perk Campaign Perk
Medal of Honor
Increases the honor effect
Firestone Tree 1 Meteorite Tree 1-2
Scroll Research
Icon
Name
Description
Locations
Scroll of Damage
Increases the effect of Scroll of Damage
Meteorite Tree 1 Amulets
Scroll of Speed
Increases the effect of Scroll of Speed
Meteorite Tree 1 Amulets
Scroll of Health
Increases the effect of Scroll of Health
Meteorite Tree 1 Amulets
Ancient Knowledge
Increases the damage of all heroes and guardians while all 3 scrolls are active
Talent Tree
Skips Research
Icon
Name
Description
Locations
Skip Wave
Increases the chance to skip a wave
Firestone Tree 1 Meteorite Tree 2 Exotic Tree 2-* Alchemist Tree 1** Amulets, Achievements
Skip Stage
Increases the chance to skip a stage
Firestone Tree 2 Meteorite Tree 2 Exotic Tree 2-* Alchemist Tree 1** Amulets, Achievements
* Exotic Tree 2 and onwards have stage-restricted wave and stage skips from stage 1000 and onwards
** Alchemist Tree 1 has stage-restricted wave and stage skips up to stage 1000
Timer Research
Icon
Name
Description
Locations
Trainer Skills
Reduces the training cooldown of all guardians
Firestone Tree 1 Talent Tree
Librarian
Reduces the research time of all firestone researches
Talent Tree, Amulets Ancient Artifacts Guild Perk, Guild Tree Campaign Perk Chaos Rift League Beasts
Alchemy
Reduces the duration of all experiments of the alchemist
Talent Tree Ancient Artifacts Guild Perk, Guild Tree Campaign Perk Chaos Rift League Beasts
Meteorite Research
Icon
Name
Description
Locations
Meteorite Hunter
Increases the chance to get 100% more meteorites from the miner
Firestone Tree 2 Alchemist Tree 1 Talent Tree, Amulets
Coworkers
Increases the chance for 2 miners to appear with meteorites
Talent Tree Tavern Luck
Beer Research
Icon
Name
Description
Locations
Cheers
Increases the chance to get 100% more beer from the dragon
Amulets Guild Perk Campaign Perk
Twin Dragons
Increases the chance for 2 dragons to appear with beers
Talent Tree
Misc Research
Icon
Name
Description
Locations
Battle Cry
Increases your contribution to the fellowship effect