Pieces of the Heart

"Jesse, what the fuck are you talking about?" - Werner Heisenberg when his assistant first presented him with undeniable proof of the existence of pieces of the heart
The Pieces of the Heart (or Heart Pieces) refer to the internal metaphysical elements that comprise the makeup of every living thing in existence.
==Properties==
Heart Pieces are the constituent parts of every conscious being in the universe. They are what provide a living thing its identity and sense of self. Each individual heart piece provides a different element of personality and losing one or more heart pieces can have serious deletery effects. Heart pieces can also exist in varying quantities and concentrations with some individuals possessing more, less, or even none of a particular piece. Pieces can also be extracted from individuals through various means and likewise inserted forcibly into others. Extracted Heart Pieces can only be stored in specially designed bottles that can be bought at Quest Buy.
===Sanity===
Sanity provides the positive aspects of the human condition. Happiness, joy, generosity, altruism, etc are all properties of sanity. It is a relatively rare element within the Discordant Realms. WeskerPawnch, Gay Robot, and Vice notably do not posses any of this. The highest concentration of sanity ever measured was found in Charlie Dayman. 
=== Insanity ===
Insanity is the competing element to sanity. Whichever exists in higher concentrations will exhibit more influence upon the person. High insanity causes hallucinations, paranoia, anxiety, erectile dysfunction, homosexuality, fondness for anime, creation of fucked up characters in Phantasy Star Online, and the writing of retarded wiki shitpost articles. Insanity also shares similar resonant properties with the precious glass Ebony. 
=== Nut ===
Nut is the primal force that provides the very presence of life itself. Without nut a person will not just die, they will simply cease entirely, as if they never existed at all. Nut is unique in that it is the only Heart Piece that the body is able to spontaneously produce more of. Therefore, nut can only run out if its extraction rate exceeds its production rate. Only two entities in the universe are known to be capable of this; women (such as the Succubus) and that weird machine Gay Robot keeps in his basement. 
=== Immortality ===
Also known as Purp, immortality is a secret Heart Piece that only exists in those that have consumed the legendary Purple Elixir. Surprisingly, immortality does not necessarily prevent an individual from dying. Instead, it keeps them from staying dead, eventually resurrecting them in a flash of purple fire and a blast of swanky rap music. It is notoriously difficult to permanently kill an individual under the effects of purp, with even the highest tier of Archons struggling to do so. Not to be confused with Immortal essence, which is more akin to Nut in its nature.
=== Despair ===
Also known as Darkness or Human Dregs, despair is the densest Heart Piece and is usually what remains after all other elements (except Nut) are removed from a person. Despair can be increased by attempts to discover the Eldritch Truth, trying to understand the plot of Kingdom Hearts, and from hanging around Brandon. 
=== Dreams ===
[REDACTED] 
== Dark Continent Campaign ==
Early in the Dark Continent Campaign, Vice ordered Field Medic Tia Safalin to develop a procedure to extract cum from the locals to power the Egg I. Using that weird machine Gay Robot keeps in his basement as inspiration, she experimented on constructing a more humane version of the device. During the first test run, she accidentally managed to extract the subject's sanity instead, filling the bottle with its brilliant golden light. 
Vice was utterly entranced by the cool glow it gave off and quickly became obsessed with filling as many bottles with the stuff as possible. He had Safalin run the machine over and over, but after only a few cycles the bottles stopped being filled with the radiant light of sanity. Instead they became filled with the ethereal eery black fog of insanity. Vice thought this stuff was also cool as hell and kept the extraction going until [REDACTED]. Finally, the bottles began to slowly fill with a thick inky deep blue liquid that was painful to look at and bottles containing it provoked emotional pain at their very touch. Vice finally called off the experiment as he didn't think Despair was his color and just wanted more of the glowing stuff. 
Not content with the current inefficient method of extraction, Vice became determined to seek out newer better ways to produce those glowing bottles.