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Book of Mercenaries is a single-player game mode first released on April 6, 2021.

It uses a classic linear adventure format with an appearance similar to Dungeon Run screen. Like Book of Heroes, Book of Mercenaries is about telling the journeys and stories, but the main characters are mercenaries, who were first introduced in Forged in the Barrens as legendary cards and unique to Hearthstone.

Like Book of Heroes, Book of Mercenaries will feature a chapter for each of the ten current classes, for a total of 80 missions or bosses. It is completely free to play and available to everyone. Additionally, completing a class's story rewards the player a corresponding class pack.

Warrior was the first class and Forged in the BarrensRokara's story was the first story to be introduced. New missions will be released over the course of the coming months.


Book of Mercenaries' Choose Hero menu

For general information on adventures, see Adventure.

  • Book of Mercenaries comprises 80 boss encounters in total.
    • The encounters are split into 10 class' stories, making each consist of 8 encounters.
  • The player is given pre-made deck for each boss encounter, controls a special hero with their corresponding Hero Power, and gets special interactions between their hero and boss.
  • During a class' story, the player must encounter the bosses in order and cannot choose the specific ones.
    • However, if the player loses an encounter, the player can try again without being reset to the first encounter, unlike Dungeon Run or similar modes.
      • The player can press the "Retire" button, which is under the player's hero portrait, to be reset willingly.

Boss encounters and characters[]

Below are the current lists of boss encounters and lists of player characters of Book of Mercenaries. Note that the lists will be updated when there is a new class story to be released over the following months.

Release schedule[]

Dates marked with an asterisk (*) are only datamined and the date and order are subject to change.

Hero Date of release
Icon Warrior 32.png Forged in the BarrensRokara April 6th, 2021
Icon Priest 32.png Forged in the BarrensXyrella June 3rd, 2021
Icon Druid 32.png Guff June 15th, 2021
Icon Demon Hunter 32.png Kurtrus July 13th, 2021
Icon Warlock 32.png Tamsin August 31st, 2021
Icon Paladin 32.png Cariel November 9th, 2021
Icon Rogue 32.png Scabbs November 16th, 2021
Icon Hunter 32.png Tavish February 1st, 2022
Icon Shaman 32.png Forged in the BarrensBru'kan February 14th, 2022
Icon Mage 32.png Dawngrasp March 17th, 2022


File:Book of Mercenaries Reward.png

A hero's Book of Mercenaries has been completed

Upon completing a class' story, the player can claim a corresponding class pack. As soon as the player defeats the final boss of a story, a following note, titled <Hero name>'s Book of Mercenaries, appears:

<Hero name>'s Book of Mercenaries has been completed. Celebrate with a new card pack!

Boss cards[]

Main article: Book of Mercenaries boss cards

In addition to the collectible cards from card sets, Book of Mercenaries brings many unique cards, Playable Heroes, Hero Powers and many more available only during the boss encounters.


Journal.pngPlease add any available information to this section.

Patch changes[]

External links[]

  • Blizzard Entertainment (2021-04-06). Meet the Mercenaries. PlayHearthstone. Retrieved on 2021-04-08.