Number M

Number M, also known as Malefic Number, is a sub-archetype of the "" archetype in . Their effects treat them as both their original counterparts' names and as "" monsters.

Like the "Malefic" archetype, only one copy of them can be on the field, and they are destroyed if no Field Spell Card is in play. Unlike this archetype, however, their effects state only one copy of their own name can be on the field instead of just one "Malefic" monster (likely for the purpose of ). Furthermore, their controllers' other monsters can attack as well.

"Number M" monsters can be Summoned via a way similar to Chaos Xyz Evolution, by using their original counterparts as the Xyz Material. However, they cannot use themselves to be Summoned; for example, to Xyz Summon "Number M101: Silent Honor ARK", you cannot use another "Number M101: Silent Honor ARK" as the Xyz Material, but rather its original counterpart with its Attribute of WATER.