The Twins

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The Twins
The Twins.png
Statistics
TypeBoss
KB Resist100%
Immune toConfused.png
Drops
Coins12 Gold Coin
Item (Quantity)Rate
Soul of Sight.pngSoul of Sight (20-40 / 25-40 Desktop VersionConsole Version) 100%
Greater Healing Potion.pngGreater Healing Potion (5-15)100%
Hallowed Bar.pngHallowed Bar (15-30 / 20-35 Desktop VersionConsole Version)100%
Twin Mask.pngTwin MaskDesktop VersionConsole VersionMobile Version14.29%
Retinazer Trophy.pngRetinazer Trophy10%
Spazmatism Trophy.pngSpazmatism Trophy10%
Horned God Boots.pngHorned God Boots ((Old-gen console version))14.29%
Treasure Bag (The Twins).pngTreasure BagDesktop VersionConsole Version(The Twins)100% Desktop VersionConsole Version
Retinazer Trophy.png "This is going to be a terrible night..." Spazmatism Trophy.png

The Twins are a Hardmode Mechanical Boss which is essentially 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. If an Altar has been destroyed, they also have a 10% chance of spawning each night until the boss is defeated. Their approach is signaled at dusk via the chat message, "This is going to be a terrible night..."

While The Twins are alive, music Boss 2 will play.

Attacks[edit | edit source]

  • Retinazer: has a scarlet iris and fires purple lasers. It will usually attempt to remain diagonally above the player.
  • Spazmatism: has a lime iris and fires balls of Cursed Flame. It will usually attempt to remain horizontally in line with the player.

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

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

  • 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, but doing significantly less damage. The barrages become more intense and frequent the more damage Retinazer takes, eventually occurring nonstop. In its second form, Retinazer will only shoot at the player(s) and no longer attempt to ram into them.
  • Spazmatism becomes a mechanical mouth. It chases the player, charging 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.
  • In Expert mode, Retinazer's laser firing becomes faster and charges become farther as its health depletes. Spazmatism's fireballs inflict Cursed Inferno for a longer length of time; sixteen seconds instead of eight. Spazmatism will also charge faster in its second form.

Eyes[edit | edit source]

RetinazerFirst Form
Retinazer.png
Statistics
TypeEnemy
AI TypeRetinazer AI
Damage40 / 76 Desktop VersionConsole Version (eye laser)
45 / 76 Desktop VersionConsole Version (melee)
Max Life20000
30000 Desktop VersionConsole Version
Defense10
KB Resist100%
Map Icon Retinazer (first form).png
Map Icon
SpazmatismFirst Form
Spazmatism.png
Statistics
TypeEnemy
AI TypeSpazmatism AI
Damage50 / 88 Desktop VersionConsole Version (cursed flame)
50 / 85 Desktop VersionConsole Version (melee)
Max Life23000
34500 Desktop VersionConsole Version
Defense10
KB Resist100%
Inflicts debuffCursed Inferno.pngCursed Inferno 50% chance
Debuff duration16% for 8 seconds,
then 25% for 5 seconds,
then 50% for 3 seconds
16, 10, 6 seconds Desktop VersionConsole Version
Debuff tooltipLosing life
Map Icon Spazmatism (first form).png
Map Icon
RetinazerSecond Form
Retinazer (Second Form).png
Statistics
TypeEnemy
AI TypeRetinazer AI
Damage50 / 92 Desktop VersionConsole Version (death laser)
36 / 68 Desktop VersionConsole Version (rapid fire)
67 / 113 Desktop VersionConsole Version (melee)
Max Life8000/20000
12000/30000 Desktop VersionConsole Version
Defense20
Map Icon Retinazer (second form).png
Map Icon
SpazmatismSecond Form
Spazmatism (Second Form).png
Statistics
TypeEnemy
AI TypeSpazmatism AI
Damage60 / 108 Desktop VersionConsole Version (eye fire)
75 / 127 Desktop VersionConsole Version (melee)
Max Life9000/23000
13500/34500 Desktop VersionConsole Version
Defense28
Inflicts debuffCursed Inferno.pngCursed Inferno 50% chance
Debuff duration16% for 8 seconds,
then 25% for 5 seconds,
then 50% for 3 seconds
16, 10, 6 seconds Desktop VersionConsole Version
Debuff tooltipLosing life
Map Icon Spazmatism (second form).png
Map Icon

Achievements[edit | edit source]

Achievement Buckets of Bolts.png Buckets of Bolts • "Defeat the three nocturnal mechanical menaces: the Twins, the Destroyer, and Skeletron Prime."
Defeat all three Mechanical Bosses.Desktop VersionConsole Version
Achievement Mecha Mayhem.png Mecha Mayhem • "Do battle against the Twins, the Destroyer, and Skeletron Prime simultaneously and emerge victorious."
Defeat all three Mechanical Bosses simultaneously in a single battle.Desktop VersionConsole Version
Achievement Ophthalmologist.png Ophthalmologist • "You have defeated The Twins!"
Defeat The Twins for the first time.Old-gen console version

Notes[edit | edit source]

  • Similar to the Eye of Cthulhu, The Twins will not spawn if you log out after the message "This is going to be a terrible night...," is displayed.
  • The Twins will not spawn after the message "This is going to be a terrible night..." if all players are underground.
  • On Console and Mobile versions, 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. This does not happen on the Desktop version.
  • 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.
  • In its second form, Spazmatism's eye fire functions almost identically to the Flamethrower weapon, with similar range and damage but inflicting the Cursed Inferno debuff instead of On Fire!.
  • The Twins are defeated when the last eye alive is killed. On multiplayer it is possible that only one of the two eyes despawn while all players are dead. The battle can still be completed for whole loot (excluding the missing eye's trophy) provided that someone respawns near the remaining eye before it disappears.

Tips[edit | edit source]

For more elaborate strategies on defeating The Twins, including Weapon and Arena recommendations, see Guide:The Twins strategies.

  • Concentrate on killing Spazmatism completely first, as its cursed flames are difficult to avoid in its second form. Fighting them both in their second phases simultaneously makes the fight significantly more difficult.
  • Both of the Twins are vulnerable to the Frostburn, Ichor, and Cursed Inferno debuffs. As such, a viable combination is Frost Armor, a Megashark (if The Destroyer has been defeated), and either Ichor Bullets or Cursed Bullets. The Twins will be inflicted with two debuffs simultaneously.
  • In both of the Twins second form, using items like a Cross Necklace or having Titanium armor greatly helps take less damage by becoming invincible during most of their strong "Rapid Attacks"
  • If the Twins are ever out-run, such as with the case of a long railroad, they will despawn regardless of the time of night. This allows you to only have to fight one of the two Twins, and will most likely be Spazmatism due to it always trying to follow you.
  • Try to defeat one of the two Twins at a time. Having both in their second forms at near equal health will prove dangerous to any player, especially in Expert mode.
  • Try to beat Spazmatism first since Retinazer is less deadly, cannot inflict a debuff and will not charge in its second form. It is also easier to outrun Retinazer and therefore get away from it quicker whilst shooting a Megashark or a Hardmode Repeater from Hardmode Ores.
  • Because Souls of Sight are used mainly for making magic based items, this boss is less rewarding to players going for ranged or melee/warrior builds.
  • Shadowflame Knives and Cursed Flame-based weapons are an excellent against The Twins, as neither of them are immune to the Shadowflame and Cursed Inferno debuffs.
  • The SharangaOld-gen console versionMobile Version3DS version is an excellent weapon against The Twins if it is fired as the player runs away.

Trivia[edit | edit source]

  • 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 are the only Mechanical Boss with phases, and is also the only mechanical boss that seems to be partially made of flesh, possibly being biomechanical hybrid. Unlike the other two, they are vulnerable to more debuffs.
  • They are the only boss with two trophies.
  • Although The Twins spawn off the screen, the tendril between them can spawn in the screen.
  • The Twins are one of two Bosses with a minion designed after it, the other being the martian saucer and the xeno staff.

See also[edit | edit source]

History[edit | edit source]

For changes that affect all the mechanical bosses, see Mechanical Bosses#History.
  • Desktop 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 active.
  • Desktop 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.
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