Essence of the Ultimate Intellect
By consuming this Essence, you transcend all known limits of intelligence.
*Your intellect (mental capacity, mental focus, calculation, computation, cognition, competence, memory, wit, ingenuity, creativity, mental perception, learning capacity, deductive and inductive reasoning, visualization, analysis, instinct, intuition, self-awareness, composure, mentality, multitasking, etc.) become the absolute maximum possible in all existence, and perhaps slightly beyond even that.
*Your intellect is not only exponential but also transcendent and flawless. The only possible cause for your making a mental error would be the GIGO principle, because your cognition is perfect within the limits of the data available. Even a supermassive quantum-computing Matrioshka Brain would be less than a protozoa compared to you. Your processing capacity also scales up without limit when necessary, to the point you could effortlessly solve any finite algorithm in a single unit of Planck time.
*You no longer have a subconscious, your intellect being enhanced to the point that you have a "supra-conscious" mind instead. Like a subconscious your supra-conscious is capable of performing both mental and neuro-physical actions as background tasks without needing you to actually focus on them (although your heightened focus and multi-tasking could let you simultaneously concentrate on any number of separate things if need be), but unlike a subconscious you may have your supra-conscious execute almost any task or tasks that your conscious mind would be capable of, however complex, and have your conscious mind exert total control over its functions when necessary.
*You have instantaneous, effortless access to every iota of every quality and characteristic that you possess, and every scrap of knowledge that you ever have acquired or ever will acquire. This includes a perfect memory with unlimited storage, retroactive across your entire life, bordering on postcognition.
*Fully comprehend and control your emotional state. While you still have a normal capacity for emotion should you so choose, you never become emotionally compromised or traumatized by anything unless you allow it. Your mind can process, resolve, and overcome trauma with near-instant speed when you focus on doing so, and will also autonomously use this self-repair capacity to return you to at least adequate mental functioning should your mind somehow be too catastrophically damaged to focus.
*Your intellectual expansion will not materially alter your personality against your will. You can apply your newly heightened capacities for self-awareness and introspection towards personal growth and change if you want. Otherwise you'll still remain "yourself" as much as possible, without risking the death of personality that can sometimes accompany transcendence.
*On the principle of a "sound mind in a sound body," you gain perfect health and average fitness for your species. The heightened capacity for conscious bio-feedback that your supra-conscious provides allows you to, among other things, maintain your level of physical fitness without deliberate exercise.
*This "supra-conscious mind" means that you are as perfectly sane, or insane, as you consciously choose, in whatever emotional proportions, as easily as moving some mental sliders on a mixing console. This is more apropos to the notion of a transcendent intellect while allowing more creative freedom.
*It also means you can just choose to not be bored if you don't want to be, hence the boredom immunity no longer having its own line.