This is based on the Evolution Missions from Heart of the Swarm. You should probably read down here to know how this'll work.

As a warning, I do not own Starcraft or any works that come into play.

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Far in deep space, there is a...thing. It was known to be a nightmare that came in endless droves that would overwhelm even fleets of thousands and militarized worlds. Because they were constantly changing...adapting.

They were known as the Zerg. Created by an ancient race known as the Xel'naga, they were race considered a perfect being. Without tools, they would be able to thrive in any environment and defeat whatever foe they came across, even when it became the Xel'naga themselves.

However, very few had free will. Most were under an overriding directive to consume and destroy. All part of an ancient plot plunge the universe into flame. Those who escape became Primal. The rest became the Swarm. And now, the Swarm has been given a chance to be from this enslavement. The ultimate threat to everything known has now become a new symbol. For those not bound to it and understand their new purpose, a symbol of hope to save it all. For others, it's a symbol of vengeance, especially for it's new leader...The Queen of Blades.

Formerly known as Kerrigan, she was a psychic assassin who worked for an oppressive human Empire known as the Confederacy. Responsible for the murders of many rebels against this collective evil, she defected and became one herself. She hoped by siding with their leader, Arcturus Mengsk, they would finally have the power they need to bring a new era to the Terrans.

Until she was horribly betrayed, first having the world of billions that was the Confederates' homeworld abandoned to the Zerg. She was forced to go against the Protoss, the arch enemies to the Swarm with the belief she would be extracted thereafter. And then, she was abandoned. Captured. Transformed into an infamous murderer with no real will of her own, influenced by a malevolent entity that sought to recreate the world.

Thanks the efforts of many like the one she loved, James Raynor, she had regained her freedom from the overriding directive. Instead of influence, she was driven by vengeance and doing what had to be done. Regathering the Swarm and eliminating everyone who stood in the way, Kerrigan brought down the man who betrayed her, who turned into another nightmare of the Terrans. With the human monster destroyed and her vengeance fulfilled, there was one thing left to do…

Defeat this ancient enemy. And by doing so...Evolve.

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Leviathan...

The Queen of Blades sat on her throne. Various zerg organisms lurked around her chamber while a Zergling creature sat next her.

They've been waiting for days, maybe weeks, since the last battle against Mengsk's world of Korhal. At least with him out of the way and the Terrans he trusted safe, there is far greater hope than what their average citizen could believe in. But the new enemy was also greater. Confronting an unknown enemy that could destroy worlds and minions that imitated the Swarm's capabilities, there isn't much time before their plan continues to be put in motion. Because where they were was unknown, that was even more trouble.

Kerrigan's thought process was interrupted when she received something telepathically. It was Izsha, first a psionic terran medic, now her immense Leviathan creature's organic database bound to the core.

"My Queen, we have some new reports for you."

"Go ahead."

"It requires you to head to the nervous system. Our broodmothers and officers want to brief you personally."

"Very well, I'll go ahead."

Leviathan Nervous System…

As Kerrigan walked to central system, equivalent to a warship's command bridge, the Leviathan opened up to the emptiness of space. She noticed there were...distortions of some kind. Holes that warped to unknown locations for whatever entered it. She saw her officers were eager to see her.

"My Queen," Zagara, a Swarm Queen-like Broodmother who became her highly loyal disciple, greeted her leader. "The leading Swarm units have discovered this field of space-time distortions."

"I see them. Fields of mass fluctuations. The big question is where do they lead."

"They appear to be gates to new worlds, my Queen," Izsha answered. "Our scouts reported to have arrived in new universes that connect to this one. And many other civilizations yet to discover."

"Earth had many fascinations about this," Stukov, a human from Earth's united Directorate, pointed out. "It looks like some of their fantastical science is proven correct."

"Explain."

"Various science fiction authors now forgotten wondered what was the meaning and nature behind wormholes like these. Are they gates to new worlds? Different time periods? Or just another part of the known universe? While some of this is true, these lead to somewhere..different. Not exactly the universe we know of, but similar. Ones that have different laws and rules that our world would or wouldn't have if compared to it."

"So they're like parallel universes."

"You...could say something like that. Another would say they're different dimensions. I remember Earth sending various ships some such portals, but gave up when some of them never returned from the other side. Perhaps if you want to look, now's the time."

"Our priority here is Amon, Stukov. I don't want to make any more enemies if I don't need to."

"Who knows? There's also a chance Amon could be found right here."

"Opportunity...to collect...ESSENCE." Dehaka, the new leader for the Primal Zerg packs spat out.

"I will be the judge of that, Dehaka. We don't want to jeopardize the entire Swarm just for something less important than our mission."

"I'm afraid there's no need as it is already too late," Stukov assured. "Your spider friend has already gained interest in the various creatures there. Human and non-human."

"Abathur…"

"He already has preparations for you," Izsha informed. "He wants you to see him soon."

"I will." Kerrigan's energy started to rise. "But if it involves screwing up for his curiosity, I'll going to make him pay big time."

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Evolution Pit…

Kerrigan walked along the chambers the evolution pit. She passed through many of the different creations, created for adaptation to the various situations the Swarm came across. At the center was a hole that was really a den entrance to the runner of the pit. When Kerrigan came up to the hole, a mutant green spider-like creature came out.

"Important news."

"Explain yourself, Abathur!" Kerrigan was radiating her eyes.

Abathur felt a crushing pressure and his body stretched for a moment. His body lied still for a moment before it recovered.

"Scouts discovered new essence. New capabilities from parallel worlds."

"What kind of capabilities that would be worth exposing our very presence?"

"Extremely unique. Not found in any other world."

"I know that. I mean are they any that would be useful against our new enemy?"

"Very. Surpassing Swarm strength if left alone. Must acquire, must master, must overcome originator."

"Well then. We're already going against a dangerous foe. Preparing for future threats shouldn't hurt. How will it work?"

"Evolution process usual. Variety of strains available for section of Swarm operation."

"So we set some tests and decide which ones to add into the Swarm."

"Accurate. This time, number of unknown viewers will decide. More popular one will be integrated into Swarm."

"Unknown viewers?" the Queen shook her head. "Very well then. Prepare the experiments. Just try not to make too much trouble."

"Trouble interferes with Swarm, but inevitable. Will avoid much as possible. Preparing tests now."

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So like it says here, I'll be making a chapter for new strains on certain parts of the Zerg, both for units and how they are played. They will take in other fictional universes where the strains are found and give everyone an example of how they work. Then, while sending reviews, you determine your favorite.

Once the chapter comes, sit back and left the fun begin.