Molten Boss

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This article is about Molten Boss. You may be looking for other uses of Molten.

Sandbox Only Content

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Molten Boss was previously removed on the 5th 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.

<infobox>

 <title source="title1"><default>Molten Boss</default></title>

<image source="image1"></image> <panel> <section> <label>Modern</label> <image source="modern_image"/> </section> <section> <label>Legacy</label> <image source="legacy_image"/> </section> </panel> <label>Mode Appearance</label> <label>Wave Debut</label> <group> <header>Statistics</header> <panel> <section> <label>Regular</label> <label>Base Health</label> <label>Base Shield</label> <label>Health Scaling</label> <label>Mega Health</label> <label>Defense</label> <label>Speed</label> <format>Very Slow (1) </format> <label>Cash Given</label> <label>Spawned By</label> <label>Hidden?</label> <label>Flying?</label> <label>Ghost?</label> <label>Lead?</label> <label>Attributes</label> </section> <section> <label>Event</label> <label>Base Health</label> <label>Base Shield</label> <label>Health Scaling</label> <label>Mega Health</label> <label>Defense</label> <label>Speed</label> <format>Very Slow (1) </format> <label>Cash Given</label> <label>Spawned By</label> <label>Hidden?</label> <label>Flying?</label> <label>Ghost?</label> <label>Lead?</label> <label>Attributes</label> </section> </panel> </group> <group> <panel> <header>Abilities</header> <section> <label>Regular</label> <label>Ability 1</label> <label>Ability 2</label> <label>Ability 3</label> <label>Ability 4</label> <label>Ability 5</label> <label>Ability 6</label> <label>Ability 7</label> <label>Ability 8</label> <label>Ability 9</label> <label>Ability 10</label> </section> <section> <label>Event</label> <label>Ability</label> <label>Ability 2</label> <label>Ability 3</label> <label>Ability 4</label> <label>Ability 5</label> <label>Ability 6</label> <label>Ability 7</label> <label>Ability 8</label> <label>Ability 9</label> <label>Ability 10</label> </section> </panel> </group> <group row-items="2" collapse="closed"> <header>PVP</header> <label>Send Cost</label> <label>Wave Unlock</label> <label>Economy Bonus</label> <label>Send Coolown</label> <label>Send Number</label> <label>Spawn Timer</label> <label>Stat Changes</label> </group> <group collapse="closed"> <header>Music</header>

<format>Version 1

File:Tower Defense Simulator OST - Final Wave ORIGINAL

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   <format>Version 2

File:(Official) Tower Defense Simulator OST - Fallen Boss

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   <format>Version 3

File:(Official) Tower Defense Simulator OST - Molten Doom

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   <format>Version 4

File:(Official) Tower Defense Simulator OST - Meltdown (Molten Boss Theme)

</format>

   <format>{{{music-5}}}</format>
   <format>{{{music-6}}}</format>
   <format>{{{music-7}}}</format>
   <format>{{{music-8}}}</format>
 </group>

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CurrentTranslatedApril Fools 2022Version 3Version 2Version 1

"Its the Molten Titan!
Shoot him with everything you have, and don't get burnt!"

―Commander dialogue on Wave 40 (Legacy Molten)

"It's liquid titanium!
Shoot and shoot with all you got!"

―Commander dialogue on Wave 40 (Translated Molten)

"Its the Mowten Titan! (๑•̀ㅂ•́)૭☒
Shoot him with evewything you have, and don't get buwnt! ε=ε=(っ*´□`)っ"

―Commander dialogue on Wave 40 (April Fools 2022 Molten)

"Things are getting really. Really. Heated."

―Beginning of Wave 40 (27 November 2019 – 29 October 2020, Molten)

"Boss text here lol"

―Beginning of Wave 40 (13 October 2019 – 27 November 2019, Molten)

"Everything changed...
When the Fire Nation attacked."

―Beginning of Wave 50 (Pre-MEGA)

Description

The Molten Boss appears as the final boss in the Sandbox exclusive Legacy Molten mode.

Like most other major bosses, the Molten Boss moves very slowly, but it has an extremely high amount of health. It also has Burn Immunity, making it immune to burn damage. Additionally, as it is a boss enemy, it is immune to being frozen, slowed down by the Toxic Gunner, confused by the Jester, damaged by the Nuke's fallout, knocked back, slowed down by the DJ Booth and it is only slowed down by the Electroshocker and Warden instead of being stunned.

It has three abilities:

1. Its first ability is Magma Stomp which will create a shockwave and stun towers that are hit.
2. Its second ability is Scythe Slam which will summon six random enemies. In Hardcore, it summoned in Molten Titan and Lava, in Molten it summoned Molten Titan and Molten, while in Sandbox mode is only summons in Normals.
3. Its third attack is Fireball. The Molten Boss throws an explosive fireball at a tower. This sets the targeted tower and all surrounding towers on fire, stunning them for a period of time.

Strategy

• As with most major bosses, the Minigunner, Pursuit, Ranger, Turret and Accelerator are recommended for their high DPS.
  • The Commander can also be used to boost the firerate of these towers with its ability.
  • The DJ Booth can also help increase the range of these towers, decrease their high prices, or increase their damage output, or all three at Level 5.
    • You can set a DJ Booth to its Red track to maximize damage output while also increasing range and decreasing upgrade costs of towers in its range.
• You cannot defend your towers against the Fireball attack if your towers do not have immunity to stun. Additionally, the attack has quite a long range.
  • You can mitigate its effects by not grouping towers together.
  • Air-based towers, cliff towers and the Medic are immune to this attack. Additionally, the Gladiator and Warden can block this stun, so long as they do have not blocked another attack within the last few seconds.
  • A few bait towers can be used to distract the Molten Boss, making it less likely to throw the fireball at other towers.
• You can use the Medic to shield towers from the Molten Boss's Fireball and Stomp stun.
• The Toxic Gunner cannot be used to slow this down.
  • Stunning towers like the Electroshocker can only slow it down instead of stunning it. Similarly, freezing towers can also only slow it down instead of stunning it.
  • The Jester's confusion cannot confuse it, but its ice bombs can still slow it down.
  • It cannot be slowed down by the DJ Booth.

Gallery

Previous Variants

• 
  Third version (29 October 2020 – 8 May 2021)
• 
  Second version (13 October 2019 – 29 October 2020)
• 
  First version (30 June 2019 – 13 October 2019)

Corpse Variants

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

Thumbnails

• 
  Molten Boss on the game thumbnail.
• 
  Molten Boss on the game thumbnail.

Promotional Images

• 
  Molten Boss on a promotional image.

Trailers

• Molten Boss in the game trailer.
  Molten Boss in the game trailer.
• Molten Boss in the game trailer.
  Molten Boss in the game trailer.
• Molten Boss in the game trailer.
  Molten Boss in the game trailer.

Renders

• 
  Molten Boss on a render.
• 
  Molten Boss on a render.
• 
  Molten Boss on the matchmaking icon.

Development Images

• 
  Molten Boss on a development image.
• 
  Molten Boss on a development image.

Charms

• 
  Molten Boss on the Molten Boss Charm.

Badges

• 
  Molten Boss on the “Defeat Molten Boss” badge.

Miscellaneous

• 
  Molten Boss on one of the Paradoxum Games group logos.
• 
  Molten Boss on its Index icon.

Trivia

• Until the Gravekeeper was added, this was the only regular major boss in the game.
  • However, the Swordmaster predates the Molten Boss by six days.
• The Molten Boss used to spawn Moltens instead of Lavas in Molten mode.
• There was once a glitch where you could place a tower on the body of the Molten Boss when it was killed.
• The Molten Boss was originally the logo of Paradoxum Games, the group that owns Tower Defense Simulator.
• Before the MEGA Update, the phrase "Everything changed... When the Fire Nation attacked.", which was played before the Molten Boss appeared, was a reference to the opening of the show Avatar: The Last Airbender.
• The magma horns on the Molten Boss are a retextured version of the Fiery Horns Of The Netherworld accessory from the Roblox catalog.
• The pauldrons worn by the Molten Boss are a retextured version of the Crushing Crystals Pauldrons accessory from the Roblox catalog.
• The Commander's dialogue before the Molten Boss appeared called the Molten Boss the Molten Titan, likely due to a developer oversight.
  • Given the fact that the "Boss" suffix tends to be used more often for enemies who are stronger versions of weaker enemies (For instance, Speedy Boss being the name of stronger versions of the weaker Speedy enemy), the name "Molten Titan" seems to be more fitting for the Molten Boss and vice versa. It's entirely possible that the two respective enemies' names were swapped in development, whether it be on purpose or accidental.
• Prior to the MEGA Update, the Molten Boss had two additional abilities.
  • The first was Scythe Raise which healed between 350 and 735 health over a period of 3.5 seconds.
  • The second was Scythe Swing. The Molten Boss would swing its scythe, stunning all towers in a 15-stud radius.
• The Molten Boss appeared alongside the legacy Fallen King on the old "You Lost" screen.
• The Molten Boss' third final wave music is the same song as Battle Royale by Alec Koff.
  • The current theme is a remix of the same song.

Update History

• 30 June 2019 - BETA v1.3
  • Molten Boss added.
• 15 August 2019 - v1.3.1
  • Now has Freeze Immunity.
• 13 October 2019 - Release v1.0
  • Appearance changed.
  • New abilities: Magma Stomp, Fireball
  • Removed abilities: Scythe Raise, Scythe Swing
  • Summon animation changed and can now spawn Molten Titans.
  • Moved from wave 50 to wave 40 in Normal mode (now Molten mode).
  • New final wave music, Fallen Boss.
  • Can now be attacked by the Pyromancer, but still has Burn Immunity.
  • Health increased from 40,000 to 55,000.
  • Now is a Boss enemy.
• 9 November 2019 - Release v1.2
  • Final wave music changed from Fallen Boss to Molten Doom.
• 11 February 2020 - Release v1.7
  • Death animation added.
  • MEGA Health scaling added.
  • Now has Partial Electric Immunity.
• 29 October 2020 - Overhaul v1.0
  • Appearance changed.
  • Health increased from 55,000 to 70,000.
  • Fireball speed increased.
  • Can now spawn Lava in Hardcore mode.
  • Partial Electric Immunity replaced with Energy Immunity.
  • Summoned enemies no longer give money when damaged.
• 8 May 2021 - Overhaul v1.3
  • Appearance changed.
• 4 July 2021 - Overhaul v1.4
  • Molten Boss can no longer be slowed down by the Toxic Gunner.
• 22 March 2022 - v1.1.0e
  • Final wave music removed.
• 11 April 2022 - v1.1.0k
  • Final wave music re-added.
• 29 July 2022 - v1.3.0
  • Final wave music changed from Molten Doom to Meltdown.
• 23 May 2023 - v1.7.3a
  • Energy Immunity replaced with Stun Immunity.
• 3 May 2024 - v1.20.0
  • Molten Boss can no longer be confused by the Jester.
• 10 May 2024 - v1.21.0
  • Molten Boss is now immune to the fallout damage from the Nuke.
• 18 May 2024 - v1.22.0
  • Molten Boss is now immune to knockback.
• 23 May 2024 - v1.23.0
  • Bug: Molten Boss cannot be targeted by towers.
• 23 May 2024 - v1.23.1
  • Bugfix: Molten Boss can now be targeted by towers again.
• 28 August 2024 - v1.29.0
  • Bug: Can be slowed down by the DJ Booth.
• 31 August 2024 - v1.29.7
  • Bugfix: No longer can be slowed down by the DJ Booth.
• 6 November 2024 - v1.40.0
  • Molten Boss can no longer have its defense dropped.
• 11 December 2024 - v1.45.0
  • No longer appears in Molten mode, as it has been replaced by the Molten Warlord.
• 17 December 2024 - v1.46.4
  • Molten Boss now appears in Legacy Molten mode, if activated through Sandbox mode.
• 17 December 2024 - v1.46.5
  • Molten Boss no longer appears in Legacy Molten mode, as it has been removed.
• 12 February 2025 - v1.53.3a
  • Molten Boss now appears in Legacy Molten mode, if activated through Sandbox mode.
  • Bug: No longer appears in the Index.
• 1 April 2025 - v1.59.0
  • Bug: Molten Boss occasionally stops moving after using some of its abilities.
• 30 April 2025 - v1.63.0
  • Bugfix: Molten Boss no longer stops moving after using some of its abilities.
  • Bug: Molten Boss no longer uses the death sound effect.
• 5 June 2026 - v2.0.0
  • Molten Boss removed from the main game, now appears only in Legacy Molten mode, if activated through Sandbox mode.

Legacy Molten
Previous Debut	Current Debut	Next Debut
Molten Titan Wave 39	Molten Boss Wave 40	End N/A

Hardcore
Previous Debut	Current Debut	Next Debut
Circuit & Speedy King Wave 43	Molten Boss & Molten Titan Wave 44	Warden, Health Cultist, Soul, Fallen Hero & Soul Stealer Wave 45

Pre-MEGA (Normal, Hard & Insane)
Previous Debut	Current Debut	Next Debut
Tank 2 Wave 46	Molten Boss Wave 50 (End of Normal Mode)	Controlled Wave 51