Summary
Aside from other sentient empires that may have been hostile or peaceful, players can also encounter many wonders of the galaxy while playingStellaris, ranging from anomalies that need to be resolved to archaeological sites that will reveal how past empires thrived before the player established their empire.
Moreover, Leviathans can also be encountered as one of the galactic anomalies with varying degrees of friendliness. Some may greet the player passively without any care, while others may instantly attack any fleet, be it a science vessel or military fleet. Either aiding or defeating those Leviathans might greatly improve the player’s empire as they attempt to survive the harsh galaxy.

10Automated Dreadnought
Stationary Ancient Warship Capable of Destruction
Within the vast galaxy, there is a chance for a player to encounter an Automated Dreadnought, an ancient warship that is permanently patrolling an empty system, immediately hostile to any foreign ships that enter the system. The ship will mercilessly fire at will, and it willrequire a specialized approach to defeat it.
Upon defeat, the Automated Dreadnought’s debris will give two choices for the empire. They can either salvage the ancient warship for a huge amount of energy credits, alloys, and engineering research points or simply restore the ship to its greatness, adding to the fleet power of the empire.

9Spectral Wraith
Wandering Leviathan That Can Knock at an Empire’s Capital
Players that detect a strange pulsar with the Pulse Germination modifier will have to be on alert, as a unique wandering Leviathan called the Spectral Wraith can spawn out of it and travel anywhere, including an empire’s capital. Should it be undefended, a player can expect the system to be completely decimated of its starbases and outposts.
Defeating this particular Leviathan will bring a huge number of advantages to an empire. A defeated Spectral Wraith will give an increase in Physics research speed, an increase in energy weapons damage, and additional energy credits from jobs.

8Stellarite Devourer
Merciless Leviathan Capable of Wiping Out Systems
Triggering a Stellarite Devourer upon entering a system is never fun for any stellar empire, much less when the Leviathan is angry enough to attack the empire’s systems to disable its starbases. Defeating the Leviathan is not a cakewalk,as it needs specialization for a fleetto match the Leviathan’s power.
Although harvesting the corpse can grant a huge amount of resources to catapult an empire into power, studying its egg sac can be more rewarding with its special covert operation, Consume Star. If a Consume Star covert operation is successful, the system planted with the egg will lose all population and habitability within its planets, making it quite deadly in the right hands.

7Voidspawn
Deadly Surprise Comes From a Planet
Settling on a planet should have been hassle-free for the most part, but unlucky players can instead have a colonized planet that turns out to be an egg for an unborn Leviathan in the form of a Voidspawn. Defeating such a creature requires ahumongous amount of effort, as the Leviathan is quite strong.
However, an empire that is strong enough to defeat it will be able to research a special Leviathan trait that can be gene-modified into an empire’s species, granting extra habitability and making the species consume energy credits instead of foods. Alternatively, it could also grant a special technology, Gargantuan Evolution, which increases energy credits for jobs.

6Enigmatic Fortress
A Challenging Leviathan Fortress With Intricate Puzzle
An empire that finds an Enigmatic Fortress will be facing two hard challenges in the form of defeating the fortress, as well as an intricate puzzle to gain a huge amount of rewards from successfully investigating the defeated Leviathan.Choosing the wrong choices during the investigationwill lead to the Leviathan getting powered up again.
Aside from the huge amount of research points, a successful investigation will also give the player rare technologies: Enigmatic Encoder and Enigmatic Decoder. Both technologies grant unique ship components that are capable of making a player’s fleet stronger than its rivals.

5Ether Drake
Space Dragon Guarding Valuable Hoards
A fantasy trope usually includes the slaying of a dragon that guards a huge amount of treasure, and the same can be found inStellarisas well. Players can encounter Ether Drake in a star system with the unique name Dragon’s Hoard, with a huge potential for resources to be mined.
Aside from the Dragon’s Hoard, the trait Dragonslayer can also be acquired by the Admiral commanding the fleet that defeated the Leviathan. Moreover, a special project will spawn in the Dragon’s Hoard that will grant strong armor technology for ships and an egg that can be hatched to gain a special controllable Ether Drake.

4Scavenger Bot
Ancient Construct Eternally Wandering For Scraps
A huge battlefield will usually leave a lot of debris from the destroyed ships, and this leads to the creation of a Leviathan called Scavenger Bot, patrolling an ancient battlefield for scraps to be added to its monstrous body. Although strong,a specialized fleet focused on certain componentscan make short work of the Scavenger Bot.
After defeating the Leviathan, a player can get numerous boons, including multiple rare technologies to enhance ship designs and a system containing 20 minerals and a unique resource, Nanites, which can be used to aid the construction of a Megastructure.

3Infinity Machine
A Strange Machine With Constant Calculation for Eternity
Avid explorers of the galaxy will sometimes encounter a huge, calculating machine that is passive and welcoming to any visitor who is curious about its presence. The machine, which named to be an Infinity Machine, willask an empire for aid in its researchfor the ‘infinity,’ which the player can aid by sending one of its brightest Scientists.
Completing the special project can give an empire a research boost that can range from modest to numerous, depending on the random outcome of the event. On the other hand, simply destroying the machine can grant an empire a huge amount of minerals and influence.

2Tiyanki Matriarch
Guardian of a Peaceful Spacefaring Species
Veterans of the game will be familiar with Tiyankis, a peaceful spacefaring species that often passes through a system without any harmful intention. Turns out, all the Tiyankis originated from a system with a huge Leviathan guarding it called the Tiyanki Matriarch.
Players can choose to leave the system alone peacefully or defeat the Leviathan to claim numerous prizes. An Admiral named Reth Unddol andits powerful battleshipAH4B can be acquired when dissecting the Leviathan, in addition to the option of getting the special Polymelic trait to quicken population growth.

1Dimensional Horror
Nightmarish Creature From Another Plane of Existence
A galaxy would not be complete without its horror, and it exists within the unique Leviathan that spawns randomly named Dimensional Horror. This horrific monstrosity is a challenge to defeat, but its reward might be enticing for any player to attempt to risk their fleet.
Defeating the Dimensional Horror will grant a huge number of research points to Physics and Society, the rare technology Jump Drive, and a special parade that can either massively boost a planet’s research and unity generation or annihilate the planet, leaving a singular Black Hole in its wake.