Separate and Distill
Oft overlooked for the raw destructive power of Manipulation or the creative possibilities of Transformation, Transportation is highly prized by those who realize it's true potential.
At it's core, Transportation is the act of confining an amount of energy into a particular place or form. This has many applications, but is usually used in tandem with Manipulation to gathering and restraining energy for transport, usually by condensing it into a form of solid energy crystal known as All-Matter and then sealing its energy signature to the physical form of the crystal.
Another widely known application of Transportation is in Rune-work and the creation of Artifice, tools that can manipulate the six skills without the direct input of a Fallen. For Runes, and thus the Artifice they are inscribed upon, to work, Manipulation must be used to feed energy into the runes and Transportation must then be used to seal it in place, powering the Rune or Rune-set. (We'll get into Runes later).
Transportation can also be used to activate portals between the physical dimensions and the lower dimensions, making it an essential skill for any community in contact with the Spirits. Most would use dimensional gates, they themselves intricate pieces of Rune-work, but those who are truly gifted in Transportation are said to be able to travel between planes whenever they wish.
Perhaps a most insidious use of Transportation is the fact that since it can confine energy and spirits are made of energy, it can be used to imprison spirits, often into baubles or bits of jewelry, but sometimes into pieces of the landscape. Transportation can also be used to seal away the Void, and the denizens thereof. (More on the Void later... when I think you're ready).
Transportation is thus known as the Merchants Skill. Not only is it instrumental in the creation of many of the devices that are commonplace in more energetically inclined societies, but it is often a necessary part of the act of trade in societies where the currency is raw energy. Moreso, it can by used to travel and even protect oneself in a pinch... or gain some rather illicit merchandise in the form of trapped spirits and devils.
Next up, one of the skills I mentioned several times in this post, Manipulation!
(Yeah, the raw destructive power one. It's the one that lets you set things on fire.)