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Clash of Clans Wiki
For similar building in the Home Village, see Mortar.
For the Clan Capital counterpart, see Multi Mortar/Clan Capital.
Multi Mortar9.png

"Fires long range splash damage multiple times to maximize chances of hitting its target!"

Multi Mortar1.png Multi Mortar2.png Multi Mortar3.png Multi Mortar4.png Multi Mortar5.png
Level 1 Level 2 Level 3 Level 4 Level 5
Multi Mortar6.png Multi Mortar7.png Multi Mortar8.png Multi Mortar9.png
Level 6 Level 7 Level 8 Level 9


  • The Multi Mortar is a defensive building on the Builder Base that shoots splash-damaging Mortar shells at ground units, shooting four per blast. It is unlocked at Builder Hall level 5.
  • The Multi Mortar shells do low damage by themselves, but medium damage altogether. Additionally, the shells themselves have a fairly large splash radius.
  • The Multi Mortar has a large range, but cannot hit troops which are too close to itself.
  • The Master Builder can gear up a Mortar in your Home Village that is level 8 or higher (which requires Town Hall level 10) to make it fire in bursts similar to the Multi Mortar. To do so, the Multi Mortar needs to be level 8 or higher in the Builder Base, which requires Builder Hall 8.


Defensive Strategy

  • Place the Multi Mortar at the center of the base to cover as much area as possible and to slow troops from getting too close to it.
    • You can use the Multi Mortar's inability to hit nearby units to your advantage, as the Multi Mortar will target support units, such as the Sneaky Archers, Cannon Carts, and Night Witches behind the tanks, in order to defeat them.
  • The Multi Mortar's splash damaging shells makes it good at taking down hordes of low-hitpoint troops, but can be easily distracted by high-hitpoint troops. In particular, they work very well against Sneaky Archers and Skeletons dropped by the Drop Ship, but can also deal good damage to Raged Barbarians, Night Witches and Cannon Carts.
  • Because of its inability to hit nearby troops, it can be good to place the Crusher near it, as it is another area damage defense that deals high damage. However, the Crusher cannot fully cover the blind spot of the Multi Mortar due to its extremely short range. In addition, neither can attack air troops, so that should also be kept in mind when building a layout.
  • The Multi Mortar can stop Bombers from doing too much damage to your base. At relative level, where the Bomber is twice or less than the level of the Multi Mortar, a volley of 4 shots can destroy a Bomber.

Offensive Strategy

  • Air units are a good option, as the Multi Mortar cannot hit them.
    • Drop Ships cannot be attacked by the Multi Mortar, but its Skeletons can be easily wiped out by it, unless they get too close.
  • Use tanks such as Boxer Giants or the Battle Machine to distract the Multi Mortar while you swarm the base. Take care that they do not all enter the Multi Mortar's blind spot, otherwise, it will retarget.
  • Try to get near it, as it cannot hit troops close to it.
  • Try to spread out your troops, so the Multi Mortar cannot hit all of them at once. For example, if you deploy Raged Barbarians at one point the Barbarian's health will often be reduced, killing them. Spreading them makes the Multi Mortar lock on 1 Barbarian before locking on another troop.

Upgrade Differences

  • The Multi Mortar undergoes significant visual changes at levels 2, 3, 4, 5, 7 and 9.
  • At level 1, the Multi Mortar appears as three small mortar barrels tied together, sticking out of a wooden structure that is also reinforced with ropes.
  • At level 2, a fourth barrel is added, the base elevates slightly and loses its ropes.
  • At level 3, the base gains additional reinforcing planks. The rope holding together the barrels becomes a metal band, and the barrels themselves become thinner and larger.
  • At level 4, the corners of the base are now secured by copper metal. The barrels become properly aligned, larger, and gain a copper band around the midsection.
  • At level 5, the corners are now secured by a gray metal and a stone base is also added below the wooden structure. The copper band becomes a thin golden ring.
  • At level 6, the rivets on the corners are replaced with metal handles. Large cogs appear on the sides of the Mortar and the barrels become slightly larger. The shell also changes to a dark stone.
  • At level 7, the handles on the corners turn into riveted golden plates, and the gears on both sides turn to a gold color also.
  • At level 8, the band securing the barrels is now a gold color also, and the plates revert to becoming golden handles.
  • At level 9, the Multi Mortar takes on a bright yellow color scheme, with the gold details of the previous level replaced by yellow details. The handles on the corners are replaced by hexagonal bolts. Additionally, the sides of the Mortar gain metal plating.


  • Though appearing to have only three barrels at level one, it still fires four shots per burst (likely because this establishes consistency with other levels).
    • However, every level of the Home Village Geared-Up Mortar has three barrels, and only fires three shots per burst.
  • The Mortar shells only shoot out of one barrel, as opposed to the other three barrels.
  • It's unknown why the Multi Mortar can't attack air like the Scattershot, as the ammos appear to be flying before dealing damage. However, it may be not flying high enough.
  • The Multi Mortar is the only defensive building in the Builder Base that has a unique sound effect when tapped or placed.

Icon Descriptions

Icon Info.pngTapping this icon displays information about the Multi Mortar, such as Level, Damage Per Second, Hitpoints, Range, Damage Type and Targets.
Icon Upgrade.pngTapping this icon begins upgrading the Multi Mortar to the next level, if you have enough resources and a free Master Builder or O.T.T.O. When the Multi Mortar is at maximum level, this icon is not shown.
Icon HoB.pngTapping this icon instantly upgrades the Multi Mortar to the next level, at the cost of one Hammer of Building if you have one. When the Multi Mortar is at maximum level, or the Builder Hall requirements for the next level are not met, this icon is not shown.
Icon FinishNow.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
Icon FinishNowBoB.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
Icon FinishNowBoE.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
Icon Cancel.pngTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.

Builder Hall Level 1 2 3 4 5 6 7 8 9
Number Available 0 0 0 0 1 1 1 1 1
Size Size
Damage per Second*
Damage per Shot
Build Cost
Builder Gold
Build Time
Experience Gained
Builder Hall Level Required
Builder Hall
1 14 25 500 600,000 8h 169 5
2 15 28 575 700,000 12h 207 5
3 17 31 661 800,000 1d 293 5
4 19 34 760 1,000,000 2d 415 5
5 20 37 874 1,200,000 3d 509 5
6 23 41 1,005 1,600,000 3d 509 6
7 25 45 1,156 2,500,000 4d 587 7
8 28 50 1,329 3,500,000 5d 657 8
9 31 55 1,395 4,500,000 5d 657 9
Range Attack Speed Damage Type Unit Type Targeted
4-13 4 shots every 5 seconds Area Splash - 3 tiles Ground

*These damage per second values are seen in-game and are approximations; it does not necessarily do this much DPS if it cannot utilise the full potential of its bursts.

Builder Base Buildings
Defensive Buildings CannonDouble CannonArcher TowerHidden TeslaFirecrackersCrusherGuard PostAir BombsMulti MortarRoasterGiant CannonMega TeslaLava LauncherWalls
Traps: Push TrapSpring TrapMineMega Mine
Resource Buildings Builder Hall (Magic Items) • Gold MineElixir CollectorGold StorageElixir StorageGem MineO.T.T.O Hut
Army Buildings Builder BarracksArmy CampStar LaboratoryBattle Machine Altar
Other Buildings BoatDecorationsObstaclesClock Tower