DarkForgeIcon Electric funeral!
The Dark Forge, formerly called the Forbidden Forge, is a special tower only available in Bonesburg, the twentieth level in Kingdom Rush: Frontiers.


There's a single Dark Forge in the Campaign and Heroic Challenge modes and three Dark Forges in the Iron Challenge.

The Dark Forge shoots high-voltage electric currents at enemies similar to the Tesla x104 from the original Kingdom Rush. Its base damage value is very good, allowing it to deal heavy damage to single targets. It attacks very slowly however, making in unfitting to deal with thick groups of enemies, though this can be rectified somewhat with Lightning Strike. As a matter of fact, 2 Lightning Strike upgrades is all it takes to kill Bats in one shot. In many ways it resembles a physical version of the Arcane Wizard: powerful single target damage, but generally ill-suited against large hordes.


Lightning Strike

LightningStrike It's electrifying!

Lightning strikes gain damage and will arc to additional targets.

Level Cost Damage Maximum Targets
1 250 50-70 2
2 150 60-80 4
3 150 70-90 5

Flesh Golem

FleshGolem It's alive...

Animates Frankie, a mindless towering automaton that follows orders without question.

HP: 500, Respawn: 12 seconds, Heal Rate: 25 HP/s.

Level Frankie Cost Damage Armor
1 Frankie1 200 10-20 [2.0s] 20%
2 Frankie2 200 30-50 [1.0s] 40%
3 FrankieAoE 200 30-50 [1.0s] 60%

On level 2, Frankie gets new Jaxx v2 arms.

On level 3, Frankie gets a special area attack that deals 150 physical damage. (Cooldown: 6.5 seconds)


  • Dark Forge is built on the key impact location but its innate attack is very slow and weak; it only hits a single target at once and the damage is not enough to outright kill even Bat. Thus, it must rely on Lightning Strike upgrade to deal any significant damage.
  • Frankie's health will be restored to full upon upgrades like Death Rider. (Not on Android and Steam due to a glitch)
  • Dark Forge suffers reduction of chain lighting damage.
  • Lightning Strike heals 10 health to Frankie when it arcs to him.


  • 12% wider than DWAARP
  • Frankie's rally point range is 90% of Dark Forge.


Related Upgrades

  • Up KRF Courage Courage (3 Stars): While in combat, soldiers & reinforcements regenerate health.


  • It's aliiiiiiiive! Haha, haha!
  • Eeeelectric funeral!


  • Frank Smash!........
  • (Snarl, snarl, snarl, snarl, snarl)


  • Frankie the Flesh Golem is an obvious reference to Frankenstein's monster, a giant, grotesque creature made of flesh and animated by electricity that appears in Mary Shelley's Gothic novel Frankenstein; or, The Modern Prometheus.
  • "Electric funeral!"
    • The name of a song by the heavy metal band Black Sabbath
  • "It's alive! Huahaha!"
    • A line spoken by the character Frankenstein in the 1931 film of the same name. It is spoken when the monster he has created comes to life.
  • It's electrifying
    • A line from the song 'You're the one that I want" from the 1978 film musical Grease.
  • "Frankie smash!"
    • A sleight on the catchphrase of the Hulk, who says "Hulk smash!"
  • Jaxx v2 arms
    • A reference to the character Jackson "Jax" Briggs from the Mortal Kombat series. From Mortal Kombat 3 onwards, Jax has a set of metal arms fitted.