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Vis (Thaumcraft 3)
Vis is the basic energy behind everything in Thaumcraft. Vis is present everywhere, though not usually seen. It is contained within Nodes, and all nodes interact with each other in a large network. Vis can only be taken out of the atmosphere by various wands: the Wand of the Apprentice, the Wand of the Adept, and the Wand of the Thaumaturge. Each wand can only hold so much vis at a time, with the higher level wands having a greater cap. Vis is used in advanced crafting recipes for the Arcane Worktable and the Infusion Altar. Most actions that have to do with vis will also potentially affect the Flux, which is the level of disturbance in the vis. The amount of vis in the atmosphere can only be seen when the Goggles of Revealing are equipped. The vis of every chunk(16x16 area) is separate and may have one or more aura nodes. If the aura in a chunk is low, the aura nodes have an animation of lightning around them(seen with the goggles of revealing) and aura is sent to it from nearby chunks. Aura crystals also deplete and release vis into the air.