Clash of Clans Wiki
Clash of Clans Wiki

Poison Spell info

"Give your army the upper hand against enemy troops with this deadly poison!
Defending units that linger in a Poison Spell's toxic cloud will move slower, attack slower and take damage with increasing severity over time. Poison Spells do not affect structures."


  • The Poison Spell is the first Dark Spell unlocked in the Dark Spell Factory, and is automatically unlocked once the Dark Spell Factory has finished being built, requiring the Town Hall to be at level 8. It slows down all enemy Clan Castle Troops, Heroes, and Skeletons inside its area of effect (and causes them to take damage over time). However, buildings remain unaffected from Poison Spells.
  • The Poison Spell slowly ramps up in damage the longer a unit stays poisoned. The effect lasts for an additional 6 seconds after the unit leaves the poison radius.



  • A Poison Spell only takes one spell housing space, and deals more total damage over the course of its duration than the Lightning Spell, the other spell that can be used to deal with Clan Castle Troops, which takes up the same amount of spell capacity. This makes the Poison Spell very appealing as a way to deal with Clan Castle Troops along with a few troops to keep the enemy troops inside the area of effect of the Poison Spell.
  • A Poison Spell has a circular area of effect for scaling damage, whereas a Lightning Spell strikes a small radius, dealing instantaneous damage. Which is ultimately more effective depends on the defending base's layout, as well as the what and where the Clan Castle Troops are, and the player's army composition.
  • As of September 18, 2015, Poison Spells do scaling damage in a similar manner to a single-target Inferno Tower, just to a lesser extent. This scaling effect dramatically affects high hitpoint units but deals much less damage against Heroes for balancing reasons.
    • The Poison Spell is still useful to slow defending Heroes down, however, but a Freeze Spell can also be a good alternative which can also affect defenses around them.
      • It can also be used to slow the speed of the opposing heroes down.
    • As the Grand Warden turns into a statue to defend (and is considered a defensive building in doing so), he is immune to the effects of Poison Spells. However, this means that he is affected by Earthquake Spells instead.
  • A Poison Spell can take a significant amount of time to kill troops, depending on the type of troops inside the Clan Castle, so make sure that you have enough time left to finish your attack after the Clan Castle troops are dealt with.
    • A level 1 Poison Spell can easily kill all the first few troops unlocked in the Barracks, as well as any level Wizards, Witches, Skeletons, and Minions. Upgrading this spell, however, is still useful, as higher-level Poison Spells kill them faster and leaves more time to finish the attack, allowing you to deal with more durable troops better.
  • If you see a Dragon, Balloons, or Valkyries on defense, it's good to use a Poison Spell on them, as the scaling effect is deadly against high hitpoint units. It also decreases their speed, which makes them slower to reach the target.
    • Although a single Poison Spell will not fully kill out very high hitpoint troops like Dragons and P.E.K.K.As, its slowing effect makes them highly vulnerable to other troops while active.
  • Multiple Poison Spells stacked will speed up the scaling process, but will not increase the maximum damage per second, so typically it is a waste if you place many at once.
  • While not a popular strategy, Poison Spells can be used to stack damage, making it possible to kill any Clan Castle units with enough spells.
  • As of the March 2016 update, defending troops will automatically attempt to escape the Poison Spell's AOE if they are currently not targeting any troop, in which case they will ignore the spell entirely. Healers and Heroes are not affected, as Healers cannot attack enemy troops and defending Heroes have a limited targeting range already.
  • A good offensive strategy is to lure the Clan Castle troops to the corner and then attack them with high damaging troops like the Wizard or a high number of Archers. Usually, when the Poison Spell is dropped on any defending troops, and if they don't have any target, then the defending troops will walk out of the radius. So, it's good to attack them with troops while the defending troops are inside the Poison Spell, to get the full potential of the Poison Spell.
    • Alternatively, you can use a Freeze Spell to make the Clan Castle troops unable to move, allowing the Poison Spell to rank up in damage.
  • As the Loading Screen Hints would say, it is a very effective answer to Skeletons spawned by Skeleton Traps. You can use another expendable troop to activate them, then deploy your Poison Spell to wipe them out.


  • Use high damage troops like the Baby Dragon or Valkyrie to still deal good damage while under the effect. If you can get one, an Inferno Dragon is your best bet since even under poison, the 3rd stage damage is extremely high. Troops with high attack rate will be affected much because the spell does massive change to this stat.
  • Ice Golems are also good because their main mechanic of freezing is not affected while under poison.
  • More than one Poison Spell is normally not good. If you have a good idea of where an attacker may start a Queen or Warden Walk, then place a Hero such that their trigger radius is at or behind the Clan Castle trigger radius in that direction, so an attacker will have to fight a hero and the Clan Castle troops at the same time, potentially forcing more Poison Spells to be brought.
  • Poison Spells are also used to kill Skeleton Trap Skeletons. Separate your Skeleton Traps so that multiple Skeletons from multiple traps can't be killed by the same Poison Spell.




Spell Duration


Damage Type

Damage Type

Housing Space



Favorite Target

Dark Spell Factory Level Required

Dark Spell Factory

4 tiles 16 Seconds Area Splash 1 Ground & Air 1
Brewing Time of Poison Spell
Dark Spell Factory available Dark Spell Factory upgrading
3m 6m
Max damage per second
Poison Effect
Speed Decrease
Movement Speed
Attack Rate Decrease
Attack Speed
Research Cost
Dark Elixir
Research Time
Laboratory Level Required
1 90 26% 35% N/A N/A N/A
2 115 30% 40% 10,000 8h 6
3 145 34% 45% 20,000 1d 7
4 180 38% 50% 43,000 2d 14h 8
5 220 40% 55% 70,000 4d 9
6 260 42% 60% 110,000 6d 6h 10
7 280 44% 65% 155,000 7d 11
8 300 46% 68% 200,000 9d 12
9 320 48% 70% 270,000 12d 13
10 340 50% 72% 350,000 15d 14


February 17, 2013 Ferniii suggested adding the Poison Spell.
Patch Description
June 28, 2015 Introduced the Poison Spell in the sneak peek, with 4 levels.
July 1, 2015 Added the Poison Spell.
July 10, 2015 Fixed Player profile for Dark Elixir Spells (showing unlocked when that was not the case).
September 9, 2015
  • Troops in Poison Spells now take less damage at first, but much more over time.
  • Poison Spell damage now increases to huge amounts and lingers after leaving the spell.
  • Poison Spells now also reduce the attack rate of defending Troops.
March 21, 2016
  • Reduced brewing time from 15m to 10m.
  • Defending Troops (but not Heroes) now flee from Poison Spells if they are standing idle. Prior to this update, they would simply stand inside the Poison Spell and stay there until their demise.
May 4, 2016 Reduced brewing time from 10m to 5m.
October 12, 2016 Reduced brewing time from 5m to 3m.
December 19, 2016
  • Added the level 5 Poison Spell
  • Slightly increased Poison Spell's radius.
June 26, 2018 Reduced upgrade times at level 1-4.
June 18, 2019 Added the level 6 Poison Spell.
March 30, 2020 Added the level 7 Poison Spell.
April 12, 2021 Added the level 8 Poison Spell.
December 9, 2021 Reduced upgrade costs and times at levels 2-6.
October 10, 2022
  • Added the level 9 Poison Spell.
  • Poison now no longer affects underground defending Miners. (Currently unknown if this also applies to the Super Miner)


  • The Poison Spell, Earthquake Spell and Haste Spell, were the first Dark Spells to be added to the game.
  • Prior to the Poison Spell, strategies that did not include a Clan Castle lure utilized a well-placed Lightning Spell to destroy defensive Clan Castle troops. With the introduction of the Poison Spell, players now have a viable alternative to destroying Clan Castle troops.
  • Unlike the Clash Royale counterpart, ghosts emerge after a Poison Spell is thrown and they keep emerging for 3 seconds along with a creepy laughing sound, rather than skulls.
    • In addition to that, the Clash Royale counterpart deals constant damage, affects buildings, and slightly reduces movement speed.
    • The Poison spell is red in Clash Royale, but in Clash of Clans, it is orange.
    • The sound effects and sprites remain identical.
  • Poison Spell's brewing time has been reduced multiple times, from 15 minutes to 3 minutes.
  • The Headhunter inflicts a Poison Spell-like effect on her attacks, poisoning any troops and heroes she hits to slow them down considerably, but this effect alone does not deal any damage.
  • The Poison Spell is the Dark Spell that has the highest level at max, being 10.
Home Village Army
Elixir Troops BarbarianArcherGiantGoblinWall BreakerBalloonWizardHealerDragonP.E.K.K.ABaby DragonMinerElectro DragonYeti (Yetimite) • Dragon RiderElectro TitanRoot Rider
Dark Elixir Troops MinionHog RiderValkyrieGolem (Golemite) • Witch (Skeleton) • Lava Hound (Lava Pup) • BowlerIce GolemHeadhunterApprentice WardenDruid (Bear)
Super Troops Super BarbarianSuper ArcherSuper GiantSneaky GoblinSuper Wall BreakerRocket BalloonSuper WizardSuper DragonInferno DragonSuper MinerSuper MinionSuper Hog Rider (Super HogSuper Rider) • Super ValkyrieSuper Witch (Big Boy) • Ice Hound (Ice Pup) • Super Bowler
Heroes & Hero Equipment Barbarian King: Barbarian PuppetRage VialEarthquake BootsVampstacheGiant GauntletSpiky Ball
Archer Queen: Archer PuppetInvisibility VialGiant ArrowHealer PuppetFrozen Arrow
Grand Warden: Eternal TomeLife GemRage GemHealing TomeFireball
Royal Champion: Royal GemSeeking ShieldHog Rider PuppetHaste VialRocket Spear
Elixir Spells Lightning SpellHealing SpellRage SpellJump SpellFreeze SpellClone SpellInvisibility SpellRecall Spell
Dark Spells Poison SpellEarthquake SpellHaste SpellSkeleton Spell (Skeleton) • Bat Spell (Bat) • Overgrowth Spell
Siege Machines Wall WreckerBattle BlimpStone SlammerSiege BarracksLog LauncherFlame FlingerBattle Drill
Pets L.A.S.S.IElectro OwlMighty YakUnicornFrosty (Frostmite) • DiggyPoison LizardPhoenixSpirit FoxAngry Jelly