1 - Essence of the Blank

By taking this essence, you gain but one benefit:

Your potential becomes limitless. You can learn any discipline or skillset, even if you shouldn't be capable of it, without forgetting it and practice them into mastery, no matter how many you learn. Any abilities you have from other Essences will increase where possible and develop in ways beyond their initial purposes.

2 - Essence of the Broker

You become a master of contracts and legalize

You may easily compose long, intricate and ironclad contracts as easily as breathing, containing or closing any loophole you wish.

If you so desire, you may conjure these contracts out of nothingness and dismiss them to a pocket dimension only you have access to.

You instantly become aware of any loophole or wording which may have positive or negative repercussions in any deal you are aware of

Anyone who agrees to a deal with you or one that you broker, whether by handshake, signing a contract or verbal agreement, must follow through with it.

You may set it so that those who agree are compelled to carry out the contract, establish penalty clauses should they fail to fulfill their obligations, or forgive their debts.

Agreements you make may range from the exchange of goods and services, to the transfer of things which are normally impossible to exchange

So long as the parties of a deal possesses ownership of something, you may "trade" or "broker" a deal for it, instantly transferring it to the appropriate party.

This allows you to broker the exchange of kingdoms, landmasses and marriages so long as they are owned, and extends to more esoteric traits like years of life, memories or supernatural abilities and powers.

You may choose to store anything obtained as a result of a contract, in said contract without it being dispersed to anyone.

If you so chose, the person who previously possessed it loses access to it, and it remains in the contract until a relevant party signs for it.

Signing these contracts may subject the person to any clauses and obligation you have embedded within it.

While the subjects of trades must do so of their own free will, doing so under coercion is still free will.

3 - Essence of Sound Mind and Soul

Upon drinking this sapphire-emerald colored liquid, you feel more at peace with yourself. This grants you several boons:

Your mind is cleansed of all mental maladies, from boredom to addiction to even insanity, and will no longer be affected by such issues for the rest of your life.

A natural mental shield now surrounds your mind and protects you from outside influence. No matter how powerful or skilled they are, no one can affect your mind against your will.

Beyond Genius level intellect with a perfect memory, archiving, indexing, instant recall, fully retroactive with protection from harmful memories

Similar to your mind, your soul is cleansed of all maladies and becomes a bulwark against spiritual based afflictions. You are completely immune to soul attacks, manipulation, destruction, and etc.

A perfect balance between your mind and soul that cannot be broken or lost. This balance protects the core of your being this granting you both infinite willpower and protection from personality death. Nothing can make you falter and you will never lose your sense of self through events such as apotheosis or reincarnation.

4 - Essence of the Grand Line (nerfed)

By drinking this shockingly disgusting fruit drink, you gain powers from the world of One Piece!

You may redesign your appearance right after you drink this essence. You also start off with access to all three forms of Haki although all abilities need to be learned and trained.

At any time you may pull a seed out of your pocket or have it appear in your hand. This seed will grow if planted into a strange plant and within a month give you a Devil Fruit based on whatever DF power you choose. This fruit acts like a normal DF and you can make only one copy of a specific fruit at any one time, but if a fruit you make is back in fruit form you can summon it back to yourself.

If you want to remove their weakness to water you can wait for two months instead of one to completely remove it.

You can also temporarily turn off a devil fruit power from fruits you yourself have grown.

Though dreams or meditation you can enter a weird island space filled with poneglyphs and Easter Island heads, these poneglyphs carry the knowledge and memories of the OP world. Everything from Fishman Karate to how to make cyborgs is here. Although finding it and studying it can be a pain. Some poneglyphs are encrypted and need time to translate. Also you can read real world poneglyphs as well.