There are two distinct themes among "Void" cards: Spells and Traps that support the "Infernoid" archetype, and cards that support the "Infernity" archetype (which were used by Kalin Kessler in the manga). There are also two members that do not specifically support either archetype: "Into the Void" and "Void Trap Hole"; however, "Into the Void" features "Infernity" cards in its artwork and fits into their playstyle.
"Unformed Void" is not a "Void" card because its Japanese name does not contain 「
"Blast Magician" appears as a character in Yu-Gi-Oh! Ultimate Masters: World Championship Tournament 2006.