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Patch12.0.0.25770
"The Boomsday Project"
Patch banner - Patch 12.0.0.25770.jpg
Ann. date:August 2, 2018
Release date:August 2, 2018
Version:12.0.0
Build:25770
Highlights & notes
Official links
Patch chronology

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11.4.0.25252

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12.2.0.26996

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Patch 12.0.0.25770 is a Hearthstone patch released August 2nd, 2018. It is a large patch, adding all data for the upcoming The Boomsday Project expansion.

Patch notes[]

This Hearthstone Update charges the nether coils as we get ready to pull the big, shiny lever that unleashes Hearthstone’s newest Expansion: The Boomsday Project, on August 7! This is also your chance to participate in cutting-edge research: drop by a special Fireside Gathering for a Pre-release Event where you can open The Boomsday Project packs and play with your new cards before the official release! This update also brings Arena updates, game mechanics updates, and a few card changes, as well as some bug fixes and feature improvements.

Read on for details.

The Boomsday Project![]

The Boomsday Project is an electrifying expansion for Hearthstone featuring 135 all-new cards, starting August 7!

Harness the power of SCIENCE, including:

  • New Legendary Spells for all nine Classes!
  • New keyword: Magnetic! Combine Mechs into more powerful forms!
  • Omega cards that are ULTRA powerful when played at 10 Mana!
  • The Boomsday Project's free single player content, the Puzzle Lab, opens on August 21!
  • Over 100 challenging puzzles including Lethal, Board Clear, Mirror, and Survival puzzle types!
  • For a limited time after The Boomsday Project starts on August 7, log in to claim 3 card packs and a random Class Legendary minion (or Hero card)—both from the new expansion—for free!
  • Get 3 more The Boomsday Project card packs FREE when you log in after The Puzzle Lab launches starting August 21.

The Boomsday Project Pre-Release Event![]

  • Attend a Fireside Gathering Pre-Release to open your packs from “The Boomsday Project”—and play with your new cards in a special Fireside Brawl—BEFORE the official launch of the Expansion! Learn more here!

Arena Updates[]

  • Offering rates for Class cards, including spells and weapons, have been reduced.
  • Rarity distribution adjusted.
  • This will result in Arena drafts having more neutral and common cards.
  • Be sure to read the Arena Developer Insights blog for details!

Game Mechanics Updates[]

See also: Game Mechanics Updates
  • Card Copying
    • Cards that create copies of other cards that are then added to different game zones have been made more consistent.
  • Transformation
    • Whenever a card transforms it loses its enchantments.

Be sure to read the Developer Insights blog for details!

Card Changes[]

  • Shadowboxer now reads: Whenever a minion is healed, deal 1 damage to a random enemy.
    • Shadowboxer can be disenchanted for its full Arcane Dust value for two weeks.

Days of the Frozen Throne[]

  • A chilly new celebration is coming!
    • New quests with huge rewards!
    • A free golden card!
    • A new Tavern Brawl celebrating the Death Knights!

Card backs[]

Added the following card backs:

  • Dr. Boom's Lab – Acquired from winning five games during the September 2018 Ranked Play Season.
  • Boomsday! – Acquired from completing all of Dr. Boom’s puzzles.
  • VanCardback – Acquired from winning five games during the October 2018 Ranked Play Season.

Bug Fixes and Gameplay Improvements[]

  • Added new “Return to Fireside” tooltip for Fireside Gatherings.
  • The Mac Client now uses Metal for graphics, where available.
  • New Daily Quest has been added for playing Mechs.
  • “Created By…” tags are no longer generated by the card’s last state before it died.
  • Deathaxe Punisher’s animation no longer plays without a valid target in hand.
  • Resolved effects and animation issues with Valeera the Hollow, Tess Greymane, and Shudderwock.
  • Zombeast cards have rarity gems, and no longer appear to be collectible cards.
  • Cards no longer display their yellow activation aura when their target can't be interacted with.
  • Card backs now properly show their cardback outline effect when played by opposing players.
  • Cards in hand no longer incorrectly overlap each other.
  • Chameleos will now transform and clear buffs when the opponent has only one card.
  • Chameleos will now copy stat buffs or cost reduction.
  • When Shifter Zerus transforms into a Worgen card, the next card it transforms into will no longer keep those stats.
  • Faceless Manipulator will now correctly advanced The Caverns Below quest.
  • Gnomish Experimenter no longer sometimes plays his transform animation twice.
  • Summoning Portal now properly updates cards that have had their mana cost set after it has been played.

Monster Hunt[]

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