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The Twins
The Twins
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Statistics
Type
KB Resist10000%
Drops
Coins10
For strategies on how to defeat The Twins, see Guide:The Twins Strategies

.

"This is going to be a terrible night..."

The Twins are a Hardmode Boss (one of the three Mechanical Bosses) that are a harder version of the Eye of Cthulhu. The Twins are two separate flying entities connected by a tendril, each with its own attack pattern and life count. Both must be killed in order to defeat the boss.

The Twins are summoned using the Mechanical Eye at night, and must be defeated before dawn, otherwise they despawn. They also have a chance of spawning on a random night once Hardmode begins, if they have not been defeated yet. Their approach is signaled at dusk via the chat message, "This is going to be a terrible night..."

Quick Answers

What are the names of the two entities that make up The Twins in Terraria? toggle section
The Twins in Terraria are made up of two individual entities known as Retinazer and Spazmatism.
Provided by: Fandom
How can The Twins be summoned in Terraria? toggle section
In Terraria, The Twins can be summoned using a Mechanical Eye. However, they can also spawn naturally once a Demon or Crimson Altar has been destroyed, as long as they haven't been defeated at least once in the current world. If they spawn this way, their arrival is announced by the status message 'This is going to be a terrible night...'. Remember, The Twins must be defeated before dawn, otherwise they will flee and despawn.
Provided by: Fandom
What does 'This is going to be a terrible night' signify for The Twins in Terraria? toggle section
In Terraria, the phrase 'This is going to be a terrible night' signals the arrival of The Twins, a Hardmode mechanical boss. This status message appears when The Twins are about to spawn, adding a sense of dread and anticipation to the game. The Twins are a more difficult version of the Eye of Cthulhu and must be defeated before dawn, otherwise, they will flee and despawn. So, when you see 'This is going to be a terrible night', prepare for a challenging battle!
Provided by: Fandom
What are the attack patterns of Retinazer and Spazmatism in Terraria? toggle section
In Terraria, The Twins, Retinazer and Spazmatism, have unique attack patterns. Retinazer, the eyeball with the red iris, fires high-velocity Eye Lasers and usually tries to stay diagonally above the player. Spazmatism, the eyeball with the green iris, fires medium velocity balls of Cursed Flame and typically tries to stay horizontally in line with the player. Both alternate between their signature ranged attacks and charging melee attacks. When their health dips to 40%, each eye transforms. Retinazer becomes a mechanical eye with a laser cannon, firing red Death Laser projectiles and ceasing its attempts to ram the player. It fires more rapidly and with higher damage, and periodically fires in quick barrages. Spazmatism transforms into a mechanical mouth that chases the player, charging with greater speed and range, and periodically spews solid streams of cursed flames.
Provided by: Fandom
What is the connection between The Twins and the Eye of Cthulhu in Terraria? toggle section
In Terraria, The Twins are essentially a more challenging, cybernetic version of the Eye of Cthulhu. They are two separate entities, Retinazer and Spazmatism, connected by a tendril. Each has its own attack pattern and life count, and both must be defeated to conquer the boss. The Twins can be summoned manually using a Mechanical Eye at night, similar to how the Eye of Cthulhu is summoned. They also have a chance to spawn naturally at dusk once a Demon or Crimson Altar has been destroyed, as long as they have not yet been defeated at least once in the game.
Provided by: Fandom

Attacks

  • Retinazer has a red iris and fires purple eye lasers.
  • Spazmatism has a green iris and fires balls of Cursed Flame.

Both alternate between their signature attacks and a charging melee attack, much like Eye of Cthulhu. Retinazer's charge dash is faster and covers a bit more distance than Spazmatism's charge dash.

Each eye has a second phase. Retinazer transforms at 8000HP, while Spazmatism transforms at 9000HP.

  • Retinazer becomes a mechanical eye with a laser turret in its pupil. It fires more rapidly and with higher damage, and periodically fires in quick barrages. The barrages become more intense the more damage Retinazer takes.
  • Spazmatism becomes a mechanical mouth. It chases the player, dashing with greater speed and range, and periodically spews streams of Cursed Flames from its mouth in a manner similar to the Flamethrower. The flames can inflict the Cursed Inferno debuff and deal high damage.

Eyes

Retinazer (First Form)
RetinazerOld-gen console version and Nintendo 3DS version
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Statistics
Type
AI TypeRetinazer AI
Damage20 eye laser
45 melee
Max Life20000
Defense10
Spazmatism (First Form)
SpazmatismOld-gen console version and Nintendo 3DS version
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Statistics
Type
AI TypeSpazmatism AI
Damage25 cursed flame
50 melee
Max Life23000
Defense10
Retinazer (Second Form)
Retinazer (Second Form)Old-gen console version and Nintendo 3DS version
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Statistics
Type
AI TypeRetinazer AI
Damage25 death laser
20 death laser (rapid fire)
45 melee
Max Life8000/20000
Defense25
Spazmatism (Second Form)
Spazmatism (Second Form)Old-gen console version and Nintendo 3DS version
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Statistics
Type
AI TypeSpazmatism AI
Damage30 eye fire

50 melee
Max Life9000/23000
Defense35

Notes

  • Unlike the Eye of Cthulhu, the twins gain defense when they take on their second form.
  • In his first form, Spazmatism's flame shots often miss, even if the player isn't moving. The same goes for Retinazer's laser bolts in his second form.
  • Both of the Twins are vulnerable to the Frostburn debuff.
  • The Cursed Flames fired by Spazmatism travel slower in honey.
  • If The Twins are summoned with a mechanical eye on a night where The Twins naturally spawn,both pairs will appear and all four eyes will be connected.
  • Both eyes can drop their respective trophy when killed, regardless of which is killed first or last. It is possible to get both trophies in one battle.

Tips

  • Concentrate on killing one eye (preferably Retinazer) first. Getting them both to their second phase at the same time makes the fight significantly more difficult.
  • If you have The Crimson in your world, use something that inflicts the Ichor (debuff) to significantly reduce the Twins' defense.
  • Retinazer is by far the easier of the Twins to hit. A combination of the Rocket Boots, Wings, a Shiny Red Balloon, and/or the Cloud in a Balloon can make keeping up with him quite easy. Using a high-DPS sword like the True Night's Edge or a ranged weapon like the Megashark can kill Retinazer completely in under 45 seconds.
  • Due to the fact that the twin’s main attacks are melee, it is suggested to use a ranged approach
  • A long flat surface with Spectre Boots equipped is suggested for easy dodging of attacks. Combined with wings, you are able to soar through the air dodging attacks that would (in other circumstances) eventually catch up to you.
  • The Star Veil/ Cross Necklace are also a good thing to have around in case the twins happen to get in close combat with you.
  • See Guide:The Twins Strategies for more tips on defeating The Twins.

Trivia

  • Retinazer's name is a portmanteau of retina, a part of the eye, and laser. Spazmatism's name is a portmanteau of astigmatism, an eye disorder, and spasm, meaning to twitch uncontrollably.
  • The Twins is the only Hardmode Mechanical Boss encounter with phases.

See also

Bugs

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History

For changes that affect all the mechanical bosses, see Mechanical_Bosses#History.
  • 1.2.3: Spazmatism increased health to 23000, decreased damage for both.
    • Spazmatism now transforms at 9000HP and Retinazer now transforms at 8000HP, instead of at half HP.
    • Now only drops 15-30 Hallowed Bars.
    • One of the twins can no longer despawn as long as the other is still
  • 1.2:
    • Now have a chance to spawn during hardmode with the message: "This is going to be a terrible night...".
    • Will now drop 20-40 Souls of Sight, instead of 20-30.
    • Health and damage reduced from 24000 and 50 to 20000 and 40 respectively.


  • 1.1: Introduced.
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