The Mortar Monkey is a MilitaryMonkeycard in Bloons Card Storm. Instead of its attacks being controlled by the player, it automatically attacks a random Bloon on the opponent's side at the end of the player's turn. If given additional Ammo by Try this!, it will use Ammo as many times as it can at the end of a turn.
The Mortar Monkey is a very cost efficient tower, dealing 40 damage per turn. However, it's completely random, only attacks after ending turn, and has less DPT than Leeching Shot Sniper for the same Gold cost.
If dealing with a Mortar as an opponent, Swarm Red Bloons can make the mortar waste its shots more often.