Arcane Scratch Void is the phenomenon where magic can be harnessed from the weave and be used as an energy source. ASV requires a generation source. Various technological solutions to tug at the weave and output ASV have been introduced to the world, some a lot cleaner than others.
ASV is the foundation all technology in Arcadia is built on.
ASV is measured in a unit called SPRKs (Sparkles).