By consuming this Essence you remove all limits on the Human Will and what it can eventually achieve, giving you the following benefits:
*Regardless of whatever happens, you will always remain as "human" - in whatever sense of the word that means to you - as you desire to be.
*As a physical baseline, you will receive a perfectly healthy human body of what you would consider ideal appearance. You start out at roughly fifty percent above peak human strength, above peak human toughness and speed, and with peak human senses. You will recover at least several times more rapidly than normal from any injury or illness that does not kill you outright.
*Your intellectual baseline will likewise be increased so that you are a truly multi-faceted genius and at least as smart and talented as any human that has ever lived. You will be a true Renaissance man, able to apply the full force of your intellect to any or all fields of endeavor that might strike your fancy with equal ease.
*If you would already be even theoretically capable of learning how to do something without the benefit of this Essence, whether it be a normal property of the setting or a unique power or ability you already possessed, then your ability to learn and develop that thing is now expanded exponentially. You can explore new modes of thought and new techniques, or learn how to experience new sensations, much more easily than those around you. You are a single-repetition learner for anything that others could teach you and when attempting to discover hidden depths of mastery within yourself or teach yourself then you will need at least two orders of magnitude less time than a 'normal' genius would.
*Being Humanity Unchained means that you are zero risk of ever becoming overspecialized or trapped in an evolutionary dead end. No matter what you learn you can always choose to learn new things if you wish, even if people could not normally learn both. Likewise, you will always be capable of approaching new concepts without being unconsciously biased or constrained by what you already know and instead judging it fairly upon its merits.
*As Humanity Unchained all limitations are lifted from your body, mind, and soul. No matter which quality of yours you are trying to improve, you will always find new ways to advance yourself a reasonable amount in a reasonable timeframe. Ultimately all it takes is you being willing to put in the effort, and you will always be able to muster sufficient willpower to be able to push yourself to improve or encourage others to do likewise.
*Optional: Humanity Unchained is intended to be a harbinger of what all humans may one day become. You may with sufficient effort and example eventually help anyone for whom you had the responsibility of ruling, raising, training, or engineering to become Unchained themselves. Likewise, all of your genetic descendants will also be Unchained, and their descendants in turn, ad infinitum.