加农炮

“Defensive building. Shoots cannonballs with deadly effect, but cannot target flying troops.”

The Cannon card is unlocked from the Barbarian Bowl（Arena 3）. It is a single-target, short-ranged defensive building with moderate hitpoints and damage. It fires cannonballs toward ground troops but is unable to target air troops. A Cannon card costs 3 Elixir to deploy.

Strategy[]

The Cannon can be used defensively behind or beside Crown Towers to help defend against melee troops.
As with any defense, it is generally not wise to play the Cannon proactively, as this may, for example, allow an opposing Dart Goblin or Musketeer to out-range it, destroy it, and then attack the player's tower. The player can, however, place the Cannon while the ranged troop is in the range of the Cannon to prevent ranged troops from out-ranging it.
Since Cannons cannot attack air troops, ranged units like Flying Machine or Baby Dragon can destroy it somewhat safely. However, given its low 3 Elixir cost, the Cannon can be used as a distraction against air troops, which gives your tower more time to shoot them down.
The Cannon is often best placed in the radius of the user's Crown Towers, to prevent flying troops such as Minions from destroying it without any issues. As such, if a Cannon is ever placed out of range of the Crown Towers, the attacking player can use air troops to destroy the cannon unhindered.
The Cannon can take down Barbarians or a Hog Rider when placed in the center of the player's side, gaining an Elixir advantage. A Cannon combined with a Mini P.E.K.K.A. or Inferno Dragon can wreak havoc on high-hitpoint troops.
The Cannon can also be a great cheap distraction for dangerous troops like the Prince and the Balloon.
It is best used against tanks; place it 4 tiles away from the river and two tiles away from the Arena Tower to pull it with the maximum distance.
- For troops that only target buildings except for the Battle Ram, place it 4 tiles from the river and 3 tiles away from the Arena Tower.
  - The building will need to be placed 4 tiles from the river and 2 tiles from the Arena Tower if the opponent executes a pig push with a Hog Rider, Royal Hogs, or a Ram Rider.
  - The player can use it to aggro building-target only troops after it crosses the bridge but only if it hasn't traveled more than 2 tiles from the bridge or it will go straight to the Arena Tower.
  - If a Balloon is placed on the very edge, you have to place it 4 tiles from the river and 1 tile from the Arena Tower. If a Balloon is placed on the very edge in front you can place it 3 tiles away from the river and 2 tiles away from the Arena Tower. If a Balloon is placed right on the path, you can do the usual building place（4 tiles from the river and 3 tiles from the Arena Tower）. The Lava Hound behaves slightly different: if it's placed on the very edge it has to be 3 tiles away from the river and 1 tile from the Arena Tower. And if it is placed on the path the player must place it 4 tiles away from the river and 2 tiles away from the Princess Tower.
  - These building placement rules apply to all buildings; even though the Tesla is smaller than most buildings, the same rules still apply.

History[]

The Cannon was added with Clash Royale's soft launch on 4/1/16.
On 2/2/16, the February 2016 Update decreased the Cannon's Elixir cost to 3（from 6）, its range to 6（from 7）, its lifetime to 40秒（from 60秒）, and decreased its hitpoints by 55%.
On 23/3/16, a Balance Update decreased the Cannon's lifetime to 30秒（from 40秒）.
On 3/5/16, the May 2016 Update increased the Common card level cap to 13（from 12）. The update also fixed the "range bug", which decreased the Cannon's range to 5.5（from 6） but its effective range was unchanged. The Cannon's hitpoints were also increased by 11%.
On 18/5/16, a Balance Update decreased the Cannon's hitpoints by 5%.
On 21/6/16, a Balance Update decreased the Cannon's hitpoints by 8%.
On 1/7/19, a Balance Update increased the Cannon's damage by 32% from 127 to 167 at tournament standard levels but decreased its hit speed to 1秒（from 0.8秒）. There was also an unannounced change to Cannon's first hit speed, an increase to 1秒（from 0.7秒）.
On 2/3/20, a Balance Update increased the Cannon's damage by 5%.
On 7/6/21, a Balance Update decreased the Cannon's hit speed to 0.9秒（from 1秒）.
On 27/10/21, the 2021 Quarter 3 Update increased the level cap of all cards to 14（previously 13）.

Trivia[]

The Cannon resembles the level 4 Cannon from Clash of Clans.
The Cannon and the Tombstone are the cheapest buildings, costing only 3 Elixir with the Cannon being the cheapest common building.
The Cannon, along with the Tesla and the Mortar, are the only Common buildings in the game.