The Twins

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The Twins
The Twins.png
Statistics
Type Boss
KB Resist 100%
Drops
Coins 12 Gold Coin
Item (Quantity) Rate
Soul of Sight.png Soul of Sight
• 20-40
100%
Greater Healing Potion.png Greater Healing Potion
• 5-15
100%
Hallowed Bar.png Hallowed Bar
• 15-30
100%
Twin Mask.png Twin Mask
14.29%
Retinazer Trophy.png Retinazer Trophy
10%
Spazmatism Trophy.png Spazmatism Trophy
10%
Horned God Boots.png Horned God Boots
Console only.png
14.29%
Treasure Bag (The Twins).png Treasure Bag (The Twins)
• in Expert Mode only Pc only.png
100%
Internal NPC ID: 125, 126
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 chance of spawning on a random night 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..."

Attacks[edit | edit source]

  • Retinazer: has an orange-red iris and fires purple lasers. It will usually attempt to remain vertically above the player.
  • Spazmatism: has a green 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 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. 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 become faster and charges become farther as his health depletes. Spazmatism's fireballs inflict Cursed Inferno for a longer length of time; sixteen seconds compared to eight.

Eyes[edit | edit source]

Retinazer
Retinazer.png
Statistics
Type Enemy
AI Type Retinazer AI
Damage 40 / 76 (eye laser)
45 / 76 (melee)
Max Life 20000/20000
30000/30000
Defense 10
Internal NPC ID: 125
Spazmatism
Spazmatism.png
Statistics
Type Enemy
AI Type Spazmatism AI
Damage 50 / 88 (cursed flame)
50 / 85 (melee)
Max Life 23000/23000
34500/34500
Defense 10
Inflicts debuff
Cursed Inferno.png Cursed Inferno
50% chance
Debuff duration 16% for 8 seconds,
then 25% for 5 seconds,
then 50% for 3 seconds
16, 10, 6 seconds
Debuff tooltip Losing life
Internal NPC ID: 126
Retinazer (Second Form)
Retinazer (Second Form).png
Statistics
Type Enemy
AI Type Retinazer AI
Damage 50 / 92 (death laser)
36 / 68 (rapid fire)
67 / 113 (melee)
Max Life 8000/20000
12000/30000
Defense 20
Spazmatism (Second Form)
Spazmatism (Second Form).png
Statistics
Type Enemy
AI Type Spazmatism AI
Damage 60 / 108 (eye fire)
75 / 127 (melee)
Max Life 9000/23000
13500/34500
Defense 28
Inflicts debuff
Cursed Inferno.png Cursed Inferno
50% chance
Debuff duration 16% for 8 seconds,
then 25% for 5 seconds,
then 50% for 3 seconds
16, 10, 6 seconds
Debuff tooltip Losing life

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. Pc only.png
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. Pc only.png
Achievement Ophthalmologist.png Ophthalmologist"You have defeated The Twins!"
Defeat The Twins for the first time. Console only.png

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.
  • 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.
  • 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 two eye despawns 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 until it disappears.

Tips[edit | edit source]

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

  • In its first form, Spazmatism's flame shots often miss, even if the player isn't moving. The same goes for Retinazer's lasers in its first form.
  • Concentrate on killing Spazmatism completely first. 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.
  • Housing the Nurse near the arena and setting the player's spawn point there, will allow the player to teleport (via Magic Mirror, Cell Phone, or Recall Potion) to the Nurse for quick healing and removing of debuffs.

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.
  • When shown on the minimap, the Twins' icons are incorrect. Retinazer starts off as its intended icon, but once enraged, the icon switches to an unenraged Spazmatism. Spazmatism however on the minimap is originally shown as an enraged Retinazer, when enraged, the icon changes to the correct enraged Spazmatism.
  • Although The Twins spawn off the screen, it's string between them can spawn in the screen.
  • The Twins are the only Boss with a minion designed after it, though some bosses have minions designed after parts of it, e.g. Duke Fishron.

See also[edit | edit source]

History[edit | edit source]

  • 1.3.0.1: Added Expert Mode drop, Mechanical Wheel Piece.
  • 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.
  • 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.
For changes that affect all the mechanical bosses, see Mechanical_Bosses#History.
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