Library Unions – Complete List and Tips

In AFK Arena, the Library is where you can use your own Heroes or your friends’ Heroes to get more buffs for those exact Heroes in your team!

You still can use the assigned Heroes for all of the other activities in the game!

afk arena library unions

The old Library is crammed with countless tales written by the travelling bards of Esperia. Within it are the stories of many great heroes, some touching, others heartbreaking. They tell the tales of how great friendships and alliances were forged, brought together to fight against a common enemy. They are forever unbreakable…

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Library/Unions Summary

  • Choose a friend’s heroes or your own heroes to form a union.
  • Different combinations of heroes can form different types of unions, increasing your formation’s total power.
  • Higher tier Heroes are able to active stronger unions.
  • You can select some of your heroes under “My Mercernaries” for your friends to borrow.
  • If a player has not been online for over 7 days or a hero being used is lost, then that hero will no longer be available as a mercenary.

Library Unions Complete List

the gallant tree Union

The Gallant Three Union

Heroes
Hogan Angelo Morvus
Rarity Bonus
Any HP +1200
HP +1.00%
Elite+ ATK +150
ATK +5.00%
Legendary+ HP +2000
DEF +50
HP +10.00%
DEF + 10.00%

Defenders Of The Forest Union

Defenders Of The Forest Union

Heroes
Nemora Arden Ogi
Rarity Bonus
Any HP +1200
HP +1.00%
Elite+ ATK +150
ATK +5.00%
Legendary+ ATK +250
DODGE +30
ATK +10.00%

The Dusk Patrollers Union

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The Dusk Patrollers Union

Heroes
Ira Kaz Lyca
Rarity Bonus
Any ATK +120
ATK +1.00%
Elite+ HP +1000
ACC +30
HP +5.00%
Legendary+ ATK +250
CRIT +15
ATK +10.00%

Master And Apprentice Union

Master And Apprentice Union

Heroes
Brutus Khasos
Rarity Bonus
Any HP +1200
HP +1.00%
Elite+ ATK +150
ATK +5.00%
Legendary+ ATK +250
LL +15
ATK +10.00%

Arcanists Union Union

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Arcanists Union Union

Heroes
Kyre Vedan isabella
Rarity Bonus
Any DEF +25
DEF +1.00%
Elite+ HP +1600
HP +5.00%
Legendary+ ATK +250
CRIT +15
ATK +10.00%

The Dragon Slayers Union

The Dragon Slayers Union

Heroes
Saveas vurk Nimisu
Rarity Bonus
Any DEF +25
HP +1.00%
Elite+ CRIT +15
ATK +5.00%
Legendary+ HP +2000
DODGE +30
HP +10.00%

The Wrathful Two Union

The Wrathful Two Union

Heroes
Grezhul Thoran
Rarity Bonus
Any HP +1,200
HP +1.00%
Elite+ ACC +30
Legendary+ HP +2,000
DEF +50
HP +10.00%
DEF +10.00%

Wisdom & Hope Union

Wisdom & Hope Union

Heroes
Tasi Ulmus
Rarity Bonus
Any HP +1,200
HP +1.00%
Elite+ ATTACK +150
ATTACK +5.00%
Legendary+ DEF +100
CRIT +10
DEF +15.00%

Castellans Union

Castellans Union

Heroes
estrilda Thane
Rarity Bonus
Any ACC +15
Elite+ CRIT +10
Legendary+ HP +2,000
ACC +30
HP +10.00%

The Lightbringers Union

The Lightbringers Union

Heroes
Belinda Lucius
Rarity Bonus
Any HP +1,200HP +1.00%
Elite+ DEF +50
DEF +5.00%
Legendary+ HP +2,000
ATTACK +250
HP +10.00%
Attack +10.00%

The Bounty Hunters Union

The Bounty Hunters Union

Heroes
Mirael Raine Fawkes
Rarity Bonus
Any DEF +25DEF +1.00%
Elite+ CRIT +15
ATK +5.00%
Legendary+ HP +2,000
ACC +30
HP +10.00%

The Sisterhood Union

The Sisterhood Union

Heroes
Ankhira safiya
Rarity Bonus
Any DEF +25DEF +1.00%
Elite+ CRIT +15
ATK +5.00%
Legendary+ HP +2,000
ACC +30
HP +10.00%

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