Lava

Sandbox Only Content

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Lava was previously removed on the 5th of June 2026, though it has been made available through the Sandbox mode later.
It is not accessible anywhere else in the game. This page will attempt to include information about both the version before removal and its re-added version.

Similar Article

This article is about Lava. You may be looking for Molten.

Lava
Mode Appearance	Sandbox Originally: Hardcore
Wave Debut	37 (Hardcore)
Statistics
Base Health	700
Speed	Average (3)
Spawned By	Molten Boss (Hardcore only) Void Reaver Fallen Reaper (Wave 38 onwards) Mystery (Hardcore, wave 38 onwards)
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	None
Ability
Ability	Regeneration - Regenerates 15% of its health every second.

Its getting pretty hot.
Lava enemies are emerging!
They heal HP!

―Commander dialogue on Wave 37 (Hardcore)

Its getting pwetty hot. (ΦωΦ)
Wava enemies are emewging! .⁰(☒д☒ₒ )⁰.
They heaw HP! (☉_☉)

―Commander dialogue on Wave 37 (April Fools 2022 Hardcore)

Description

The Lava was an enemy which only appeared on Hardcore mode. Currently, it can only be spawned in Sandbox mode if the player has the Sandbox Plus+ gamepass. It has mediocre health for its debut and has average speed. However, its main ability is to heal 15% of its health back every second. If left undamaged, the Lava can easily become an issue.

The Lava can be spawned by the Void Reaver, Fallen Reaper (wave 38 onwards) and Molten Boss (on Hardcore mode only). The Mystery can also spawn the Lava upon its death in Hardcore mode, wave 38 onwards.

Appearance

CurrentUnused

The Lava has red glowing skin, black rusted torso and legs, and metal-plated armbands. While walking, its head tilts slightly forward and it sticks out its arms. Smoke is emitted from its torso. It is about the same size as the Abnormal.

The Lava had light red glowing skin, black cobblestone torso and legs, and a metal-plated wristband on its right arm. Smoke was emitted from its torso.

Strategy

This strategy refers to the state of the game while the Invisible still appeared in the Hardcore mode.

• Do not give time for the Lava to heal its health back.
  • Make sure that you concentrate all damage to them at once. If you spread out damage across the map, the Lava will have more time to heal its health back.
  • The Railgun Tank can collide with the Lava, instantly killing it or leaving it severely weakened. This reduces the efficiency of the Lava healing back its lost health.
  • Splash damage towers such as the Mortar can be quite effective against this, as they can hit multiple Lavas at once.
• Fast firing towers, like the Minigunner, Accelerator and Turret, can be used to constantly attack the Lava, preventing it healing back any health.
  • The Ranger can also be used. However, do be aware that the Lava can heal back its health between shots due to its slow firerate.
    • The Commander's Call to Arms ability is highly recommended as it allows them to quickly deal damage towards the Lava.
• Despite being a fire enemy, it is not immune to the Pyromancer which can mitigate the regeneration effect the Lava has.

Gallery

Previous Variants

• 
  Unused version (15 August 2019 – 13 October 2019)

Corpse Variants

• 
  Second Corpse variant, current version (12 March 2025 – Present)

Development Images

• 
  Unused Lava on a development image.

Miscellaneous

• 
  Lava on its Index icon.

Trivia

• There was an unused variant Lava that was added on the 15th of August 2019 and removed in the MEGA Update, but did not appear naturally.
  • It was meant to be added to the game proper, alongside the Frozen and Deep Freeze, but this was cancelled.
  • Therefore, the Lava could only be spawned by commands.
  • This version of the Lava could also regenerate health, similar to the current version.
    • It also had similar statistics, but it had 1,000 health instead of 700 and had Burn Immunity.
    • This was similar to the Molten's ability at the time, which could also regenerate health.
• Although both enemies bear no resemblance to each other, the Lava's regeneration ability is similar to that of the Amalgamation.
• Despite being a fire elemental enemy, the Lava does not have Burn Immunity.
• The Lava looks similar to the old Lava from Tower Battles.

Update History

• 29 October 2020 - Overhaul v1.0.0
  • Lava added.
• 5 June 2026 - v2.0.0
  • Lava removed from the main game, now appears exclusively in Sandbox mode.
  • No longer appears in the Index.

Hardcore
Previous Debut	Current Debut	Next Debut
Grave Digger Wave 36	Lava Wave 37	Lead Balloon Wave 39