We've got a huge update to Hearthstone Duels arriving on January 21. Here's everything you need to know about this huge patch.

Quote From Blizzard

Launching on January 21, brings the first-ever Mid-Season Update for Duels! All players’ Duels ratings will be reset for Casual and Heroic, the Darkmoon Races Mini-Set will be added to the pool of eligible cards you can use to build your 15-card starter deck, and each class will gain access to one new Hero Power and three new Signature Treasures—one of which is Dual-Class! Lastly, we’re adding 4 new Passive Treasures and 2 new Active Treasures for you to supplement your deck with between games.

Each class will now have access to 3 Hero Powers and 6 Signature Treasures in total! These new Hero Powers and Treasures can be unlocked by meeting the below criteria associated with your Collection.

  • Hero Power #3 (Each Class) – Collect 1 Scholomance Academy Legendary Class card from that class.
  • Signature Treasure #4 (All Classes) – Collect 125 Unique Madness at the Darkmoon Faire cards.
  • Signature Treasure #5 (All Classes) – Collect 12 Madness at the Darkmoon Faire Legendary cards.
  • Dual-Class Signature Treasure (All Classes) – Collect 150 unique Madness at the Darkmoon Faire cards.

Card sets eligible for Duels starting January 21:

New Active Treasures
NEUTRAL_PVPDR_YOP_Active01_enUS_AstralPortal-67798.png MAGE_PVPDR_YOP_Active02_enUS_MageArmor-67799.png
New Passive Treasures
NEUTRAL_PVPDR_SCH_Passive18_enUS_AllShallServe-65689.png NEUTRAL_PVPDR_SCH_Passive21_enUS_Dragonblood-65735.png NEUTRAL_PVPDR_SCH_Passive36_enUS_Starving-65783.png NEUTRAL_PVPDR_SCH_Passive39_enUS_TheFloorisLava-65905.png
New Dual-Class Signature Treasures
HUNTER_DEMONHUNTER_PVPDR_YOP_DemHun_enUS_TraktamerAelessa-67487.png NEUTRAL_PVPDR_YOP_LocPriT1_enUS_JorasThuldoom-67492.png DRUID_SHAMAN_PVPDR_YOP_DruShaT1_enUS_ZukaratheWild-67462.png MAGE_ROGUE_PVPDR_YOP_RogMagT1_enUS_BritzBlazebucket-67448.png PALADIN_WARRIOR_PVPDR_YOP_WarPalT1_enUS_SuLeadfoot-67428.png
New Demon Hunter Hero Power & Signature Treasures
DEMONHUNTER_PVPDR_YOP_DemonHunterP1_enUS_IllidariStrike-67381.png DEMONHUNTER_PVPDR_YOP_DemonHuntert1_enUS_BindingChains-67382.png DEMONHUNTER_PVPDR_YOP_DemonHuntert2_enUS_BladeofQuickening-67384.png
New Druid Hero Power & Signature Treasures
DRUID_PVPDR_YOP_DruidP1_enUS_HarvestTime-67473.png DRUID_PVPDR_SCH_Druidt5_enUS_MarvelousMycelium-64407.png DRUID_PVPDR_YOP_DruidT1_enUS_AwakenedAncient-67477.png
New Hunter Hero Power & Signature Treasures
HUNTER_PVPDR_YOP_HunterP1_enUS_SavageSecrets-67496.png HUNTER_PVPDR_YOP_HunterT1_enUS_Deathstrider-67518.png HUNTER_PVPDR_YOP_HunterT2_enUS_BowoftheBeast-67494.png
New Mage Hero Power & Signature Treasures
MAGE_PVPDR_YOP_MageP1_enUS_FrostShards-67434.png MAGE_PVPDR_YOP_MageT3_enUS_Embercaster-67447.png MAGE_PVPDR_YOP_MageT1_enUS_YoggtasticTasties-67437.png
New Paladin Hero Power & Signature Treasures
PALADIN_PVPDR_YOP_PaladinP1_enUS_ModestAspirations-67394.png PALADIN_PVPDR_YOP_PaladinT1_enUS_FavoredRacer-67397.png PALADIN_PVPDR_YOP_PaladinT3_enUS_HumbleBlessings-67396.png
New Priest Hero Power & Signature Treasures
PRIEST_PVPDR_YOP_PriestP1_enUS_CallofMadness-67389.png PRIEST_PVPDR_YOP_PriestP1m1_enUS_Voidfiend-67390.png PRIEST_PVPDR_YOP_PriestT1_enUS_ShadowWordVoid-67391.png PRIEST_PVPDR_YOP_PriestT2_enUS_HeraldoftheScaledOnes-67393.png
New Rogue Hero Power & Signature Treasures
ROGUE_PVPDR_YOP_RogueP1_enUS_VileConcoction-67424.png ROGUE_PVPDR_SCH_Roguet1_enUS_AceintheHole-64951.png ROGUE_PVPDR_YOP_RogueT1_enUS_GreenTortollanShell-67425.png
New Shaman Hero Power & Signature Treasures
SHAMAN_PVPDR_YOP_ShamanP1_enUS_Stormcatcher-67459.png SHAMAN_PVPDR_YOP_ShamanT1_enUS_PayloadTotemSpecialist-67460.png SHAMAN_PVPDR_YOP_ShamanT2_enUS_ChaosStorm-67463.png
New Warlock Hero Power & Signature Treasures
WARLOCK_PVPDR_SCH_Warlockp3_enUS_SoulcialStudies-64219.png WARLOCK_PVPDR_SCH_Warlockt5_enUS_Demonizer-64406.png WARLOCK_PVPDR_SCH_Warlockt4_enUS_Demonology101-64405.png
New Warrior Hero Power & Signature Treasures
WARRIOR_PVPDR_YOP_WarriorP1_enUS_MagneticMines-67413.png WARRIOR_PVPDR_YOP_WarriorT1_enUS_ScrapmetalDemolitionist-67421.png WARRIOR_PVPDR_SCH_Warriort2_enUS_SpikedArms-65091.png