Poison Spell info.png

"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."



Offensive Strategy

  • A Poison Spell only takes one 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 now 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 does not deal the same scaling damage against Heroes for balancing reasons.
    • As a result of the lack of scaling damage against Heroes, the Poison Spell only does superficial damage against the Barbarian King and Archer Queen. The Poison Spell is still useful to slow them down, however, but a Freeze Spell can also be a good alternative which can also affect defenses around them.
    • 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.
  • 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.
    • 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.
  • 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 now run away from the area of a Poison Spell, giving the defender an advantage. However, if the attacker places down troops in the vicinity, they will prioritize engaging the troops rather than escaping the poison radius.
  • 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.
  • As the Loading Screen Hints would say, it is very effective to a bunch of Skeletons so when a lot of Skeleton Traps are triggered, use a small troop (with low hitpoints) to bring the Skeletons there and put a Poison Spell on it, then use Wizards to clear them.

Defensive Strategy

  • 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.
  • 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 Poisons 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.


  • The Poison Spell was added in the July 1st, 2015 update, with 4 levels.
  • The Poison Spell received some balance changes in September 9th, 2015 update.
    • 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.
  • The March 21st, 2016 update gave the Poison Spell an update.
    • Decreased the Poison Spell brewing time from 15 minutes to 10 minutes.
    • Defending Troops (but not Heroes) flee from Poison Spells if they are standing idle.
  • The December 19th, 2016 update added the level 5 Poison Spell and slightly increased the radius from a Poison Spell.
  • The June 26th, 2018 update reduced upgrade times of levels 1-4 Poison Spell.
  • The June 19th, 2019 update added the level 6 Poison Spell.
  • The March 30th, 2020 update added the level 7 Poison Spell.
  • In October 12th, 2020 update, game engine can now render multiple spell effects at once (combinations of all spells).
  • The April 12th, 2021 update added the level 8 Poison Spell.


  • The Poison Spell, Earthquake Spell and Haste Spell, were the first Dark Spells to be added to the game, since the July 1st, 2015 update.
  • 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.
  • When initially released, the Poison Spell used to do constant damage over time, and troops affected by the Poison Spell did not attempt to flee its radius.
  • Unlike the Clash Royale version, ghosts emerge after a Poison Spell is thrown and they keep emerging for 3 seconds along with a creepy laughing sound, rather than skulls.
  • 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, but this effect alone does not deal any damage.
  • The Poison Spell is the Dark Spell that has the highest level at max, being 8.


Damage Type

Damage Type

Housing Space


Brewing Time



Favorite Target

Dark Spell Factory Level Required

Dark Spell Factory

4 tiles Area Splash 1 3m Ground & Air 1
Max damage per second
Poison Effect
Speed Decrease
Movement Speed
Attack Rate Decrease
Attack Speed
Dark Elixir
Research Cost
Dark Elixir
Research Time
Laboratory Level Required
1 90 26% 35% 95 N/A N/A N/A
2 115 30% 40% 110 20,000 1d 6
3 145 34% 45% 125 40,000 2d 7
4 180 38% 50% 140 75,000 4d 8
5 220 40% 55% 155 150,000 9d 9
6 260 42% 60% 170 200,000 11d 10
7 280 44% 65% 185 260,000 15d 12h 11
8 300 46% 68% 200 300,000 17d 12h 12
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Super Troops Super BarbarianSuper ArcherSuper GiantSneaky GoblinSuper Wall BreakerRocket BalloonSuper WizardInferno DragonSuper MinionSuper ValkyrieSuper Witch (Big Boy) • Ice Hound (Ice Pup)
Heroes Barbarian KingArcher QueenGrand WardenRoyal Champion
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