Elementaristics

Essences are key components in every crafting recipe of Elementaristics.

In order to produce them, one must either dissolve Unrefined Clusters in Water, or use Matter Manipulation. 

Dissolving Essence Clusters into Essences

The different Matter Manipulators:

the Concentrator, the Purifier, the Infusion Basin, the Altar (with the Chaos Incantation), the Reactor, and the Tunneler.

Each one of these has their own way of working (which can be looked up in the Liber Elementium).

Rites are an early mid-game feature, focusing around the Altar and Cultists.
In order to cast a rite, an Incantation must be used on an Altar:

The Chaos Rite is cast on Glowstone, with the gentle help of a Cultist.

A rite always focuses on Aspects to be invoked, like the Chaos Aspect in this case (which is invoked with the item in the offhand). 

Further information on how rites work can be found in the Liber Elementium.

Souls and "Magan" (the blend of primal aspects and Mana) are key elements in casting spells and rites.

Each player is assigned a soul upon creating a new world, which will also determine his max. Magan, his Magan regeneration rate etc.

A soul can be identified with the Rite of Enlightenment's Sighing (further information in the doc):

An Earth Soul is identified.

Ascension is one of the mechanics most players will probably focus on, as it is focused on granting Stat Boosts, Spells, and other content, like deepened Emotions.

Currently, this mechanic is quite incomplete; however, you may read about it in the Liber Elementium.

Additionally, you might find entries that start with "A Dream of...". These entries are about final ascension, and are unimportant as of now.

Occult Energy is where this mod gets its tech part from; it's centered around generating energy and using it.
However, currently, this category only implements one storage block (the Occult Energy Core (center)), a generator (the Arcane Combustion Generator (left and right)) and one Bauble (the Maganatic Accumulator (the item on the far left of the hotbar)).

Of course, this system also comes with its own type of wand: the Channeling Tool.

This tool can link an "OE-Blocks" with another(Occult Energy Blocks- Blocks that are connected to that energy).

A Block that is linked to the other block will either provide energy or drain it (this varies from block to block, but can also be set for some).

Two active Combustion Generators that are linked to an Occult Energy Core supply it with OE.