"The casting wand is your most basic, but also most important tool. It is what you use to craft objects, activate blocks like the crucible, and countless other tasks."
The most basic wand stores a very limited amount of magical energy (called vis) that is used to perform its tasks. The replenish the energy in a wand, you must right-click and hold to draw vis from an aura node."
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First of all you will need an Iron Cap, which can be crafted from 5 iron nuggets just the way you would craft helmets out of ingots.
After you get yourself 2 Iron Caps, you can craft yourself a wand on a crafting table, with a stick in the middle and the caps on its edges.