Null Suits are an invention by Lucas Miller which cancel out any school of magic.
Each null suit has a "fishbowl-like" helmet with a retractable visor and a small panel on the wrist.
- Ep. 29: When the Director finds out that Lucas has lost control of the Philosophers Stone, she sends Merle, Magnus, and Taako to obtain null suits from Leon the Artificer. Leon initially asks for the boys' color preferences, but then says he does not have any suit of that color in that size, saying he only has orange in Magnus' size, neon yellow in Merle's size, and green in Taako's size. After there is some complaint, Leon rescinds his statements and gives the boys burgundy, burnt umber, and cinnamon colored null suits respectively.