Spectre

The **Spectre** is a huge, fast-firing turret on Serpulo that rapidly shoots out alternating piercing bullets at all nearby enemies, like an oversized Duo.

## Ammo Details

  Thorium | 80 damage
  Pyratite | 70 damage
20 area damage ~ 3.1 tiles

## Usage

Like the other 4x4 turrets, Spectre is very formidable, but very expensive to build. Its role is a general purpose, all-rounder turret. It can be added to just about every conceivable array of turrets and find some use, thanks to damaging both air and ground targets, significant fire rate and damage per shot, long range, and good accuracy. Its ammo options are easy to supply, inflict varying amounts of area damage, and two of the three don't interact with status effects, although Spectre burns through them all quickly, so sustained firing requires either dedicated ammo storage or very fast production.

* Graphite: 50 x (8.57 + 70%) = 728.45 DPS.
	+ +70% fire rate gives it higher DPS against single targets compared to Thorium, but due to lacking any piercing abilities the Spectre may get overwhelmed by hordes of enemies.
* Thorium: 80 x 8.57 = 685.6 DPS.
	+ The easiest to supply since it can be used straight from a drill. Though it has the lowest DPS, thorium deals the most knockback and pierces the front line of enemy waves, proving effective overall.
* Pyratite: 20 x 8.57 minimum, (70 + 20) x 8.57 maximum (not including the effects of burning) = 171.4-771.3 DPS (depending on whether targets are hit by the bullets).
	+ Area damage makes it better than thorium at taking out clumps of units, as well as the best damage output overall. Synergizes with Oil Tsunamis, but not those spraying Water or Cryofluid. However, it's the slowest ammo to produce and its multiplier is not that great compared to other turrets that use Pyratite. Also, storing Pyratite is dangerous because a Container full of it will spray flames all over the place if destroyed.

Other tips:

* An Overdrive Projector or Overdrive Dome is preferable for boosting the Spectre's fire rate instead of using liquids, as this turret consumes a lot for only a meagre boost. If you wish to add liquid cooling, make sure it is done by adjacent Liquid Tanks.

### Against

Spectres will be encountered on High threat level sectors and above, with enemy core(s) or drills supplying them with Thorium. Most of your units will not be able to survive under fire for long and the Spectre's range can make it difficult to avoid its shots on the ground. The cheapest way to deal with them would be to use Fortresses as their area damage combined with their long range can actually outrange the Spectre allowing you to snipe it. Alternatively, Corvus can snipe it from a safer distance and due to its damage and piercing capabilities it can one-shot any Megas trying to heal it.

## Changes

 Version 6.0, unknown builds
* Build time increased (20.46 seconds → 25.87).
* Copper build cost increased (350 → 900).
* Fire rate decreased (10 shots per second → 8.57).
* Coolant consumption rate decreased (120 Units/second → 60).
* Fire rate bonus for coolant decreased (Water: 140% → 120%, Cryofluid: 190% → 145%).
* Graphite ammo:
	+ Damage increased (42 → 55).
* Pyratite ammo:
	+ Damage increased (38 → 60).
	+ Gained 0.7 knockback.
	+ Gained 2x pierce.
* Thorium ammo:
	+ Damage increased (65 → 80).
	+ Gained 0.7 knockback
	+ Gained 2x pierce.
* Description changed:
	+ Old description: "A massive dual-barreled cannon. Shoots large armor-piercing bullets at air and ground targets."
 Version 7.0, builds unknown
* Graphite ammo:
	+ Damage decreased (55 → 50).
	+ Ammo multiplier increased (2x → 4x).
	+ Gained a +70% fire rate when used.
* Pyratite ammo:
	+ Damage increased (60 → 70).
	+ Ammo multiplier increased (2x → 3x).
	+ Gained 20 area damage spanning 3.1 tiles.
	+ Knockback decreased (0.7 → 0.6).
* Description changed:
	+ Old description: "Fires large armor-piercing bullets at air and ground targets."
	+ New description: "Fires large bullets at air and ground targets."

## Trivia

* All 4x4 turrets on Serpulo are most likely named after security exploits. The Spectre in particular is named after the Spectre vulnerability, which exploits speculative processes in processors to reveal sensitive data to an attacker.
	+ Meltdown and Spectre are the original 4x4 turrets introduced in Version 4.0, which are both named after vulnerabilities that exploit speculative processing (transcient execution CPU vulnerabilities). The Foreshadow, which was added later in Version 6.0, has an associated vulnerability that behaves differently.

## References

1. ↑ https://www.reddit.com/r/Mindustry/comments/k8q59n/til\_there\_are\_3\_turrets\_in\_mindustry\_named\_after/