To start with Aura Cascade you will need to have started with Witchery. This allows you to get the Cascading Processor.
To get a better understanding of the workings of the mod, and how to power this machine, it is highly recommended that you make an Encyclopedia Aura.

When you get the power for this machine, you will need to at least make Arcane Black Ingots, Arcane Blue Ingots and Arcane Yellow Ingots.
These are crafted with Wool of the corresponding color and an Iron Ingot, using the Cascading Processor. They are required for the final items of the earlygame.