Essence of the Home
You gain a personal home that exists outside of reality and beyond the reach of most entities. This home is practically impenetrable to any being you do not want inside, even a supreme deity could not pierce the barriers in place on this property.
The home can be of your design or you can let it surprise you by generating itself based on your needs and wants so it fits itself to you perfectly. As your needs change and grow the home will expand with new facilities as needed.
The home takes care of the basic utilities automatically and requires no connection to any preexisting infrastructure to function. In addition it has functionally infinite supplies of whatever mundane food and drink you could desire.
While inside the home you and anyone you bring will not age, have any basic needs, or suffer from illnesses.
You may optionally have the home create servants to tend to it while you are gone, you also may give the home sapience to manage things. The home is utterly and unwaveringly devoted to you. It cannot be influenced to change its mind otherwise.
This home has the capability to travel through the multiverse and can give you passage practically anywhere. It can insert itself into these places or simply open a portal for you to travel through.
Any additional essences will add functionality to this one in the form of additional rooms and facilities depending on what the essence was.
Essence of the UNSC
Gain ownership of a UNSC world similar to Reach in population and geography before it was glassed. This world has the industry and technology to build most human technology of the UNSC save for the most exotic like the UNSC Infinity.
Its population is loyal and will rapidly increase to the point where you can expand into new colonies after a few decades.
You have a solid defense force that would make the UNSC proud whether it be the Army, Marines or Navy. There are even a number of Marathon and refitted Halcyon class like the Autumn was before it was lost.
Interestingly you seem to have your own little SPARTAN program with a handful of Spartan II's, Spartan III's, and the more easily mass produced Spartan IV's
Can optionally be dropped into the setting of Halo.
Essence of the Primarch Caretaker
When you consume the vial containing the essence, a portal from a chaotic hellscape will appear either immediately or after some time. 18 capsules will drop out from this portal which will immediately close itself before any Daemons could pass through.
Upon inspecting the pods which have suddenly opened, you noticed that each pod has a single baby in it (except for maybe one, which may have twins). You are now the adopted mother/father of the 18 (19?) canon Primarchs of Warhammer 40k, and it is your job to take care of all of them.
You have excellent parenting skills, allowing you to handle 18 (19?) children without neglecting any one of them, and can shower them with parental love and affection without showing any favoritism.
Even with limited resources such as money and food, you can still properly take care of the 18 (19?) Primarch children without straining yourself.
By constantly being in touch with your children and having them interact with each other as a family, they will never grow up with the flaws they had in canon Warhammer 40k such as Lion El'Jonson being a loner, Konrad Curze growing up as insane serial killer, and Angron being angry all the damn time, they will trust and help one another albeit with some friendly sibling rivalry.
The Primarchs will display some behaviors that they would have gotten if they were in their original home planets, such as Konrad Curze fighting crime, Vulkan's preference for fire and forges, and Lorgar's need to worship a deity (he will try to worship and venerate you if you are a being of great power).
You can properly convey what your intentions and feelings towards your children are without any miscommunication and blunder. Whether they accept your reasoning is up to them, though you are incredible at convincing your children as long as you take your time.
If you properly took your time in taking great care of the Primarchs, they will see you as their true father/mother instead of the Emperor and will show absolute loyalty to you as long as you don't constantly mistreat them.
If you want, the Primarchs can be from the If the Emperor Had a Text-To-Speech Device universe, where they will have their parody counterpart's personality. Such as Magnus being a comic book nerd, Jaghatai Khan being a speed freak, Lemon Russ being a furry, and Corvus Corax being an emo.
After carrying out the babies out of the pod, you noticed that each pod has papers that have information on how to create each of the Primarch's legions, equipment and other essential items. For some reason, females can't be Space Marines and the only reason as to why as you read through the papers was that "The Adeptus Astartes can only contain males. No Girls allowed. Girls are Yucky".
You can decide to be in Warhammer 40k for this though you will face off against legions and legions of Daemon trying to kill you and the Primarchs, the asshole xenos such as the Elders and the Dark Elders trying to kill you all, and eventually the Emperor of Mankind himself. That's not even getting into Warp bullshit like Magnus talking to Tzeentch, Curze's frequent nightmares, and the warp trying to do its hardest to tempt the Primarchs to their side. So you probably shouldn't do that unless you really want a challenge.
Essence of Familial Inheritance
version 1.4
By imbibing this essence you become capable of passing on parts or even complete versions of your power to both your Children and Significant Others, including this essence as well, it is split up in multiple parts that you can choose to enable or disable, these choices count for both yourself and other affected.
Part 1, General Family Benefits.
You are completely capable of breeding with other species than your own.
No bearer of this essence or its descendents will suffer from genetic flaws or complications to their makeup, instead they will have idealized genetics.
They gain complete control over their fertility and virility, there are no negative effects during pregnancy and when giving birth, thereby ensuring that any children are born completely healthy, while also inheriting the best traits from their parents in a slightly better fashion, making them impressive specimens regardless of their heritage.
Part 2, Power Share
You, and those affected by this essence, pass on any powers, physical capabilities, mental capabilities, superpowers, perks, cyoa's, other essence's, and such to each other, the origin from which these capabilities spring from can decide whether they share parts, or their entire capabilities with others.
The way others gain access to the power share is up to you, examples ranging from: Genetic Memory, subconscious instincts, or simply like a slowly increasing awareness of new capabilities.
Part 3 Familial Loyalty.
Those affected by this essence have a strong and immutable sense of loyalty to their family, it will take heavy and pointless abuse to make them reconsider this.
Part 4, Genius level Learning and Teaching Capabilities.
With this part, you obtain a genius level teaching capabilities allowing you to teach others what you know, while also obtaining genius level learning capabilities.
Part 5, Fortunate Encounters.
This part allows for the attraction of masters of dying art's, skills, and abilities to you, whether you take the opportunity to learn from them is up to you.
Part 6. Dimensional Travel & Integration.
When entering or waking up in a new reality with your family, you get a one time adjustment of your background information, allowing for customization of your background, holdings, connections, jobs, member livelihood and such, and wealth to your liking.
Only those affected by this essence will be aware of any changes in reality, this also takes into account for how your family uses said essences and other powerup's
Part 7, personal inheritance.
You may make a one-time choice to inherit the powers and capabilities from any one you can imagine, these powers are passed down from Your Parents.
This includes their race.
Part 8, Essence Enforced Defenses.
This essence and the abilities it incorporates cannot be stolen, nullified, manipulated, sealed, by others no matter what.
Authors notes
The Significant Others qualification requires you to genuinely love them, whether this is Familial, (brotherly or sisterly bond) Romantic, even your friends can qualify for this, though they have to be at least in the Best Friend/Family Friend category.
One of the Key requirements to passing this essence on to others is the fact it requires Loyalty from both sides.
All those affected by this essence are to be considered family.