The 19.4.1 patch, arriving on January 28, includes a change for Hysteria from the Darkmoon Races Mini-Set, balance adjustments for Duels, and a handful of game improvements!

Standard Balance Updates

• Old: Choose a minion. It attacks random minions until it dies. → New: Choose an enemy minion. It attacks random minions until it dies.

Hysteria will be eligible for a full dust refund for 2 weeks after the 19.4.1 patch goes live.

Duels Balance Updates

HERO POWER UPDATES

• Old: [Passive] After you play the left- or right-most card, gain 1 Attack this turn. → New: [Costs 1] After you play the left or right-most card in your hand, gain +1 Attack this turn.

• Old: Trigger a minion's Deathrattle. → New: Trigger a random friendly minion's Deathrattle.

SIGNATURE TREASURE UPDATES

• Old: [Costs 6] → New: [Beast, Costs 8]
  • Dev Comment: Turns out Bonecrusher is a silly rabbit.

• Old: [Costs 5] → New: [Costs 4]

• Old: [Costs 6] → New: [Costs 5]

• Now has the Dragon tag.

TREASURE POOL UPDATES

• Cannibalism has moved from Passive Treasure pool 1 to pool 2
• Sandy Surprise has been removed from the Passive Treasures pool.

Miscellaneous Updates & Game Improvements

• Fixed a bug where Collection Achievement progress could get out of sync with the current contents of your collection.
  • Dev Comment: You will still never lose credit for an Achievement once it's been completed.
• Fixed a bug where Arena could fail to load for new players.
• Fixed a Duels bug where the animation for Harvest Time! would play twice.
• Fixed a Duels bug where Shadow Word: Void would summon minions based on the target minion's default Health rather than current Health remaining.
• Fixed a visual bug where notifications would persist for the Journal after completed Achievements had been claimed.