Overload

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Overload: X
You have X less mana next turn.
A player with 1 mana Overloaded this turn, and 2 mana Overloaded for next turn.

Overload is an ability which reduces the amount of mana available the next turn by the stated amount, indicated in the user interface by padlock icons.

Cards with this ability are limited to the shaman class.

Notes[edit | edit source]

  • Playing a card with Overload causes the stated amount of Mana Crystals to become pending Overloaded (a padlock icon appears beneath a permanent Mana Crystal for each point of Overload) and, at the start of the player's next turn, that number of Mana Crystals will become Overloaded: the padlocks will move up and block out the player's Mana Crystals, effectively preventing them from being refilled and used for that turn.
  • Overload is only charged when the card with Overload is successfully played from the hand. In particular:
    • If a minion with Overload is summoned through a summon effect (such as Mounted Raptor or Hungry Dragon) the player will not gain any Overload.
    • If a spell with Overload is countered by Counterspell the player will not gain any Overload, and thus their Tunnel Troggs will not trigger (however, their Unbound Elementals will still trigger since they actually played a card with Overload).
  • A player's current and/or pending Overloaded Mana Crystals has no upper limit.
  • In particular, a player can Overload more mana than they will have the next turn: even if the user interface will only display Overload equal to the player's maximum mana, the excess will still be registered and will affect mana-generating effects like The Coin and Innervate. Once the Overload has been matched, any further mana generated will be usable by the player, and will be reflected in the mana counter.[1][2]
Example: If a player plays two Dust Devils on turn 2, the result will be an Overload of 4 mana on turn 3: despite only 3 Overload will show in the interface (since the player has only 3 maximum mana), if The Coin is used the player will still have 0 available mana, and will be unable to play 1-Cost cards.[3]
Example: Overloading for 10 mana on turn 9 will only display 9 pending Overloaded Mana Crystals, but at the start of turn 10 a 10th padlock icon will appear to correctly indicate that all 10 mana are Overloaded.[1]
  • However, no amount of Overload will prevent the player from playing 0-Cost cards: since these cards cost no mana, the player's current mana total is irrelevant.[1][3]
  • Overload affects available mana only for the next turn: current Overload will disappear (regardless of its amount) at the beginning of the player's next turn, when it will be substituted by previous turn's pending Overload.
Example: If a player plays two Dust Devils on turn two, on the next turn they will have 4 Overloaded mana despite having only 3 Mana Crystals: this mana deficit will not carry over to subsequent turns, thereby allowing the player to avoid paying that part of the Overload cost at all.
  • Overload sort of "splits" the "true" cost of a card over two turns: however, you cannot avoid it even if you have sufficient mana this turn to pay the "full" cost.
  • Lava Shock and Eternal Sentinel unlock and refill all currently Overloaded Mana Crystals, increasing available mana accordingly, and clear any pending Overloaded mana.
  • Cards that check for Overload like Cumulo-Maximus and Likkim will work with both Overloaded crystals and pending Overloaded crystals.
  • Effects that destroy Mana Crystals have no effect on current and/or pending Overload, despite the visual appearance of destroying a pending Overloaded Mana Crystal.
  • Overloaded and pending Overloaded mana are not displayed for the opponent directly: players trying to estimate the opponent's available mana next turn can either use the history to check the cards played that turn or hover over their opponent's Mana Tray to see how much are locked.

Strategy[edit | edit source]

Overload allows shamans to deal very effective burst damage, and to summon some powerful minions in the early game. Overload adds an additional strategic element to the game, with the shaman gaining tempo and presence in the current round in exchange for restricted activity in the next.

Used unwisely, Overload can leave the shaman starved of mana the next turn, causing them to lose pace and potentially drop behind in the game. Be wary of using Overload in early rounds to summon powerful minions which can be easily removed by the opponent next turn, since the additional Overload cost can cause the shaman to pay twice over. Used wisely, Overload can allow the shaman to respond to demanding situations with surprising momentum.

An additional strategic element is added through certain Overload-related cards. Cards like Lava Shock and Eternal Sentinel remove all Overload for the current and coming turn, allowing the shaman to free up mana and drastically reduce the overall cost of their Overload cards, especially if played after incurring a large amount of Overload. Other cards such as Tunnel Trogg and Unbound Elemental offer a simpler synergy, with triggered effects activating in response to Overload. Overload decks combine cards such as these with a large amount of Overload cards, using cards like Lava Shock to reduce their cost, while using the Overload-triggered cards for additional threats.

Cards with Overload[edit | edit source]

Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Lightning Bloom Common Spell Nature 0 Gain 2 Mana Crystals this turn only.
Overload: (2)
Dust Devil Common Minion Elemental Shaman 1 3 1 Windfury. Overload: (2)
Guidance Rare Spell 1 Look at two spells. Add one to your hand or Overload: (1) to get both.
Lightning Bolt Common Spell Nature Shaman 1 Deal 3 damage. Overload: (1)
Stormforged Axe Common Weapon Shaman 2 2 3 Overload: (1)
Feral Spirit Rare Spell Shaman 3 Summon two 2/3 Spirit Wolves with Taunt. Overload: (2)
Lava Burst Rare Spell Shaman 3 Deal 5 damage. Overload: (2)
Lightning Storm Rare Spell Nature Shaman 3 Deal 3 damage to all enemy minions. Overload: (2)
Serpentshrine Portal Common Spell Nature Shaman 3 Deal 3 damage. Summon a random 3-Cost minion.
Overload: (1)
Doomhammer Epic Weapon Shaman 5 2 8 Windfury, Overload: (2)
Earth Elemental Epic Minion Elemental Shaman 5 7 8 Taunt
Overload: (3)
Mistrunner Common Minion General Shaman 5 4 4 Battlecry: Give a friendly minion +3/+3.
Overload: (1)
Totem Goliath Epic Minion Totem Shaman 5 5 5 Deathrattle: Summon all four basic Totems.
Overload: (1)
Runic Carvings Epic Spell Nature 6 Choose One - Summon four 2/2 Treant Totems; or Overload: (2) to summon them with Rush.
Showing all 14 cards
Lightning Bloom(329861).png
Dust Devil(129).png
Guidance(442058).png
Lightning Bolt(475077).png
Stormforged Axe(152).png
Feral Spirit(214).png
Lava Burst(679).png
Lightning Storm(463946).png
Serpentshrine Portal(210829).png
Doomhammer(172).png
Earth Elemental(124).png
Mistrunner(442057).png
Totem Goliath(329894).png
Runic Carvings(329919).png


Forged in the Barrens

The below cards are planned for release with Forged in the Barrens, coming March 30th, 2021.

Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Novice Zapper Common Minion General Shaman 1 3 2 Spell Damage +1
Overload: (1)
Feral Spirit Rare Spell General Shaman 3 Summon two 2/3 Spirit Wolves with Taunt. Overload: (1)
Doomhammer Epic Weapon Shaman 5 2 8 Windfury, Overload: (2)
Earth Elemental Epic Minion Elemental Shaman 5 7 8 Taunt
Overload: (2)
Showing all 4 cards
Novice Zapper(463936).png
Feral Spirit(463945).png
Doomhammer(475062).png
Earth Elemental(463947).png


Wild format

Wild icon.pngThis section concerns content exclusive to Wild format.
Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Beakered Lightning Common Spell Nature Shaman 0 Deal 1 damage to all minions. Overload: (2)
Zap! Common Spell Nature Shaman 0 Deal 2 damage to a minion. Overload: (1)
Finders Keepers Epic Spell Shaman 1 Discover a card with Overload. Overload: (1)
Forked Lightning Common Spell Nature Shaman 1 Deal 2 damage to 2 random enemy minions. Overload: (2)
Lightning Bolt Common Spell Nature Shaman 1 Deal 3 damage. Overload: (1)
Sludge Slurper Rare Minion Murloc Shaman 1 2 1 Battlecry: Add a Lackey to your hand. Overload: (1)
Storm's Wrath Rare Spell Nature Shaman 1 Give your minions +1/+1.
Overload: (1)
Voltaic Burst Rare Spell Nature Shaman 1 Summon two 1/1 Sparks with Rush.
Overload: (1)
Ancestral Knowledge Common Spell Shaman 2 Draw 2 cards. Overload: (2)
Crackle Common Spell Nature Shaman 2 Deal 3-6 damage. Overload: (1)
Crushing Hand Common Spell Shaman 2 Deal 8 damage to a minion. Overload: (3)
Jade Claws Rare Weapon Shaman 2 2 2 Battlecry: Summon a Jade Golem. Overload: (1)
Sandstorm Elemental Common Minion Elemental Shaman 2 2 2 Battlecry: Deal 1 damage to all enemy minions.
Overload: (1)
Stormcrack Common Spell Nature Shaman 2 Deal 4 damage to a minion. Overload: (1)
Totem Golem Common Minion Totem Shaman 2 3 4 Overload: (1)
Drakkari Defender Common Minion General Shaman 3 2 8 Taunt
Overload: (3)
Elemental Destruction Epic Spell Nature Shaman 3 Deal 4-5 damage to all minions. Overload: (5)
Lightning Storm Rare Spell Nature Shaman 3 Deal 3 damage to all enemy minions. Overload: (2)
Dunemaul Shaman Rare Minion General Shaman 4 5 4 Windfury, Overload: (1)
50% chance to attack the wrong enemy.
Fireguard Destroyer Common Minion Elemental Shaman 4 3 6 Battlecry: Gain 1-4 Attack. Overload: (1)
Flamewreathed Faceless Common Minion General Shaman 4 7 7 Overload: (2)
Jinyu Waterspeaker Rare Minion General Shaman 4 3 6 Battlecry: Restore 6 Health. Overload: (1)
Siltfin Spiritwalker Epic Minion Murloc Shaman 4 2 5 Whenever another friendly Murloc dies, draw a card. Overload: (1)
Squallhunter Common Minion Dragon Shaman 4 5 7 Spell Damage +2
Overload: (2)
Volcano Rare Spell Fire Shaman 5 Deal 15 Damage randomly split across all minions. Overload: (2)
Rain of Toads Common Spell Shaman 6 Summon three 2/4 Toads with Taunt.
Overload: (3)
Neptulon Legendary Minion Elemental Shaman 7 7 7 Battlecry: Add 4 random Murlocs to your hand. Overload: (3)
Eye of the Storm Common Spell Nature Shaman 10 Summon three 5/6 Elementals with Taunt.
Overload: (3)
Showing all 28 cards
Beakered Lightning(89947).png
Zap!(89439).png
Finders Keepers(49749).png
Forked Lightning(530).png
Lightning Bolt(10).png
Sludge Slurper(90599).png
Storm's Wrath(151407).png
Voltaic Burst(89866).png
Ancestral Knowledge(22319).png
Crackle(12241).png
Crushing Hand(76998).png
Jade Claws(49724).png
Sandstorm Elemental(90801).png
Stormcrack(35227).png
Totem Golem(22265).png
Drakkari Defender(62887).png
Elemental Destruction(22345).png
Lightning Storm(676).png
Dunemaul Shaman(12234).png
Fireguard Destroyer(14455).png
Flamewreathed Faceless(35226).png
Jinyu Waterspeaker(49719).png
Siltfin Spiritwalker(12277).png
Squallhunter(151383).png
Volcano(52581).png
Rain of Toads(90157).png
Neptulon(12292).png
Eye of the Storm(184664).png

Related cards[edit | edit source]

Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Landslide Rare Spell Nature Shaman 2 Deal 1 damage to all enemy minions. If you're Ovearloaded, deal 1 damage again.
Unbound Elemental Common Minion Elemental Shaman 3 2 4 Whenever you play a card with Overload, gain +1/+1.
Showing all 2 cards
Landslide(442037).png
Unbound Elemental(51).png


Forged in the Barrens

The below cards are planned for release with Forged in the Barrens, coming March 30th, 2021.

Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Unbound Elemental Common Minion Elemental Shaman 3 2 4 Whenever you play a card with Overload, gain +1/+1.
Showing the only card
Unbound Elemental(475068).png


Wild format

Wild icon.pngThis section concerns content exclusive to Wild format.
Name / Desc Rarity Type Subtype Class Cost Atk HP Description
Finders Keepers Epic Spell Shaman 1 Discover a card with Overload. Overload: (1)
Surging Tempest Common Minion Elemental Shaman 1 1 3 Has +1 Attack while you have Overloaded Mana Crystals.
Tunnel Trogg Common Minion General Shaman 1 1 3 Whenever you Overload, gain +1 Attack per locked Mana Crystal.
Eternal Sentinel Epic Minion General Shaman 2 3 2 Battlecry: Unlock your Overloaded Mana Crystals.
Lava Shock Rare Spell Fire Shaman 2 Deal 2 damage.
Unlock your Overloaded Mana Crystals.
Likkim Rare Weapon Shaman 2 1 3 Has +2 Attack while you have Overloaded Mana Crystals.
Thunderhead Epic Minion Elemental Shaman 4 3 6 After you play a card with Overload, summon two 1/1 Sparks with Rush.
Vessina Legendary Minion General Shaman 4 2 6 While you're Overloaded, your other minions have +2 Attack.
Cumulo-Maximus Epic Minion Elemental Shaman 5 5 5 Battlecry: If you have Overloaded Mana Crystals, deal 5 damage.
Lesser Sapphire Spellstone Rare Spell Nature Shaman 7 Summon 1 copy of a friendly minion. (Overload 3 Mana Crystals to upgrade.)
Sapphire Spellstone Rare Spell Nature Shaman 7 Summon 2 copies of a friendly minion. (Overload 3 Mana Crystals to upgrade.)
Snowfury Giant Epic Minion Elemental Shaman 11 8 8 Costs (1) less for each mana crystal you've Overloaded this game.
Showing all 12 cards
Finders Keepers(49749).png
Surging Tempest(151409).png
Tunnel Trogg(27246).png
Eternal Sentinel(35231).png
Lava Shock(14440).png
Likkim(90198).png
Thunderhead(89873).png
Vessina(90835).png
Cumulo-Maximus(151356).png
Lesser Sapphire Spellstone(73330).png
Sapphire Spellstone(73333).png
Snowfury Giant(62918).png

Achievements[edit | edit source]

Name Requirements Rewards
Sensory Overload (1/3) Play 15 cards with Overload. 10 Achievement Point.png
Sensory Overload (2/3) Play 50 cards with Overload. 10 Achievement Point.png
Sensory Overload (3/3) Play 150 cards with Overload. 10 Achievement Point.png

Fixed bugs[edit | edit source]

  • For a few weeks during Patch 4.0.0.10833 (LoE patch), playing a minion or spell with Overload caused you to become Overloaded the moment the card was paid for. For example, if Counterspell countered your Lightning Bolt, you were still Overloaded[4][5] (normally Counterspell triggers before Overload, preventing the effect entirely).

Trivia[edit | edit source]

  • During the game's alpha, Overload was known as "Recall". The name was changed in an unknown alpha patch prior to May 2013, but the keyword in the game's strings was not changed until Patch 4.0.0.10833.[6] The change is not known to have otherwise altered any card text or the mechanics involved, but may have reflected a different concept behind the ability.

See also[edit | edit source]

Patch changes[edit | edit source]

  • Alpha patch (unknown date, pre-May 2013): Keyword name changed from "Recall" to "Overload".

References[edit | edit source]

  1. 1.0 1.1 1.2 BuB ChaCha (2015-02-17). Overload:(10) vs. Innervate 超載:(10) vs.啟動
  2. BuB ChaCha (2015-02-16). Overload: (20) =?|超載:(20) =?
  3. 3.0 3.1 Tested by User:Taohinton, 2014-02-19. Tested twice: Played Dust Devil x 2 on turn 2. On turn 3 the mana bar showed 0/3 mana. Played The Coin and a fourth mana crystal appeared, without a padlock. However, the total remained at 0/3, and I was unable to play any 1 mana cards.
  4. http://us.battle.net/hearthstone/en/forum/topic/19877077551?page=1#4 Tested in Patch 4.0.0.10833 (LoE patch)
  5. Ben Brode on Twitter. (2015-11-16). 
  6. http://hearthstone.gamepedia.com/index.php?title=User:Taohinton/Strings/GLOBAL&diff=prev&oldid=180662