Factory

The Master is a Tier 4 tank that upgrades from the Overseer. The Master shoots Minions that shoot the nearest item that provides EXP and can be controlled by clicking or using Shift/Auto Fire.

Design
The Master has a square base and 1 Minion Spawner that spawns Minions. Before the minions were updated, the Master has a circular base and 3 Minion Spawners.

Technical
The Master can hold a maximum of 6 AI Minion Tanks which shoot bullets at nearby objects. Each tank is smaller than a newly spawned player-controlled tank. Each Minion can be controlled just like a Drone.

The following is a list of stats that affect the player's tank itself. All of the other stats, Bullet Speed, Bullet Damage, Bullet Penetration, Movement Speed and Reload effect the minion tank's bullets as they would a normal tank with the following exceptions:
 * Health
 * Regen
 * Body Damage
 * Movement Speed
 * Reload
 * Bullet Penetration increases their Bullet Penetration and Life.
 * Bullet Damage increases their Body Damage and Bullet Damage.
 * Stat upgrades are instantly given to spawned Minion Tanks, unlike other Spawner classes where the drones must respawn to get the new stats.


 * Reload affects both the speed at which you spawn Minion Tanks and the Minion Tanks' Rate Of Fire.
 * Movement Speed affects both your and the Minions' movement speed.
 * Minion Tanks' bullets are considerably smaller than normal, close to the Gunner 's bullet size.
 * As a result, they deal less damage than normal
 * Even with maxed out Bullet Speed and Reload, Minion Tanks still shoot less bullets that are slower than a maxed out Bullet Speed and Reload Tank.


 * Minion Tanks have a shorter FoV than you would expect.
 * They have the same speed as a Tank with 1 stat point in movement speed
 * They also do the same amount of damage as an Auto Turret.
 * Minion Tanks go after nearby shapes and tanks, but once the player is damaged, they will target who/what ever damaged the player more so than nearby shapes.
 * Like Arena Closers, the Minion Tanks have no recoil.

Trivia

 * It is the first tank to use other AI entities.
 * Some fans call it the "Auto 6."
 * It is the first tank to have a purple background.
 * It is the first tank to come after diep.io not being updated for over 1 month.
 * On the day it was introduced, a update came that changed the appearance of it,and also added the function where if the player pressed E, it would force the minions to shoot towards the cursor.