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The barrels become properly aligned, larger and gain a copper band around the midsection. At level 4, the corners of the base are now secured by copper metal.The rope holding together the barrels becomes a metal band and the barrels themselves become even more thinner and larger. At level 3, the base gains additional reinforcing planks.At level 2, a fourth barrel is added, the base elevates slightly and loses its ropes.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.The Multi Mortar undergoes significant visual changes at levels 2, 3, 4, 5, 7 and 9.Try to spread out your troops so the Multi Mortar cannot hit all of them at once.Try to get near it as it cannot hit troops close to it.Take care that they do not all enter the Multi Mortar's blind spot, otherwise, it will retarget. Use tanks such as Boxer Giants or the Battle Machine to distract the Multi Mortar while you swarm the base.Drop Ships cannot be attacked by the Multi Mortar, but its Skeletons can be easily wiped out by it, unless they get too close.Air units are a good option, as the Multi Mortar cannot hit them.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. The Multi Mortar can stop Bombers from doing too much damage to your base.In addition, neither can attack air troops, so that should also be kept in mind when building a layout. However, the Crusher cannot fully cover the blind spot of the Multi Mortar due to its extremely short range. 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.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. 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.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.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.To do so, the Multi Mortar needs to be level 8 or higher in the Builder Base, which requires Builder Hall 8. 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.The Multi Mortar has a large range but cannot hit troops too close to itself.Additionally, the shells themselves have a fairly large splash radius. The Multi Mortar shells do low damage by themselves but medium damage altogether.The Multi Mortar is a defensive building on the Builder Base that shoots splash-damaging Mortar shells at ground units, shooting four per blast."Fires long range splash damage multiple times to maximize chances of hitting its target!"