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Not to be confused with the Diep.io Necromancer, which has a near-identical design.

The Underseer is a Tier 3 tank in Arras.io. It upgrades from the Director and can upgrade to the Necromancer, Maleficitor, and Infestor.

In Arms Race, Underseer can also upgrade to Auto-Underseer, Underdrive, Pentaseer, or Conductor.

The Underseer is inaccessible in Siege and other single-team gamemodes.

Design[]

The Underseer has a square-shaped base with two Spawners to its sides. Its square base is shared with two of its three possible upgrades.

Technical[]

The Underseer spawns Drones that are shaped like a square. While the Underseer's Drones have the same name as the Director's Drones, these have one unique property not shared with their triangular cousins: the ability to convert squares of any kind into Drones of their kind. This allows the Underseer to gain drones at a staggering rate that is much faster than any other Director-branch tank. Its drones can be controlled in the same way as the Director's drones.

The Underseer spawns drones at about half the rate of the Director, which effectively forces it to converting (or "infecting," as some call it) squares. However, its maximum drone count is far higher than that of the Director, which is affected by how many stat points is invested into its associated stat (which is misleadingly labelled as "Respawn Rate"). The table below describes how many Drones the Underseer can have depending on how many stat points are invested into the stat.

The Underseer's FOV is wider than that of the Basic, but not as wide as that of the Director.

Stat Points Max Drone Counts
0 14
1 17
2 19
3 21
4 22
5 24
6 25
7 26
8 27
9 28


Controls[]

  • Auto Fire by pressing E.
    • On = Drones will move towards the player’s cursor.
    • Off = Drones will attack any entities which are “hostile” (Polygons included) automatically if no buttons are pressed. If there is nothing to attack, they will form a pseudo-shield around the Underseer.
  • Shift/Mouse (Right/Left buttons).
    • Holding the left click, or space, on the mouse will make the Drones move to the player’s cursor.
    • Holding right click or shift, causes them to move away from the cursor, holding it will move the Drones in the opposite direction of the mouse’s position as to where the cursor is.
    • For example, holding right click north of the Underseer will move the Drones south.

Strategy[]

  • Strong Against: anything with low DPS and other Drone classes with weaker or less drones, if the Underseer is not low on Drones.
  • Weak Against: anything with high DPS and every hostile entity if low on Drones.

As the Underseer[]

  • Players should use the two Drones spawned by the Underseer's Spawners to get more Drones.
  • One good tactic is to try and surround the hostile entity with Drones so they have less chance to escape.
  • If the Underseer is low on Drones, they should flee from battle and find any Squares to infect with so you can go back to the battle. Otherwise the Underseer will be very vulnerable and is open to attacks.
  • Don't pick the Underseer when in Maze Mode, as the limited space for your drones to move about will mean they can quickly disappear from touching maze walls.

Against the Underseer[]

  • Try and ambush the Underseer when they are attacking another tank. If they have low Drone speed, they don't stand a chance due to the fact that it cannot move it's Drones for protection in time.
  • Tanks with a large Field of View tanks work well against the Underseer, since the player can attack it from a distance while the Underseer is helpless to respond.
  • Underseers low on drones should definitely be your first target when looking for Drone-using tanks to kill, as they cannot do anything other than flee and try to find Squares.
    • Eliminate any and all squares in a convenient radius, in order to decrease the Underseer's chances of defense/offense.
    • You could keep a droneless one as a pet.

Trivia[]

  • The Underseer can infect Squares by ramming them.
  • The Underseer is particularly weak against the basic, due to its ability to deal damage

Gallery[]

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