Signature move is a series of Spell and Trap Cards, as well as retrained monsters, whose names reflect the attack or effect names of monsters used in the anime or manga. Their effects usually specify a full monster name, although archetype names are sometimes used. Most of these cards require the monster with the listed name to be on the field.
The majority of signature move cards use the names from the English dub of the anime in the TCG, although a few (mostly the earliest ones) retain their Japanese names, such as "Ancient Gear Golem - Ultimate Pound" ("Mechanized Melee" in the dub), "Burst Stream of Destruction" ("White Lightning" in the dub), "Edge Hammer" ("Slice and Dice Attack" in the dub), and "Evolution Burst" ("Strident Blast" in the dub).
Cards whose names are the same as the names of attacks or effects conducted by the key monster while it was affected by that card in the anime/manga do not count as members of this series. As such, this excludes cards such as "Neos Force" and "Terra Firma Gravity".