The essential materials needed for a storyboard artist are few, but the list gets longer as you enhance the quality and detail of your work. A number of these materials are simply a matter of personal preference.
Here are the materials a storyboard artist is likely to use.
Pencils (mechanical with 2B leads, non-repro, Ebony, Col-Erase in black and blue, etc.)
Computer, scanner, graphics programs, graphics ...