A Class

A Class is an archetype of Level 4 or lower LIGHT monsters of various Types, mostly Warriors and Machines. They represent military based objects and stuff. The archetype is called a "pseudo-Union" one. Even though the archetype has a lot of characteristics that Union Monsters possess, they are not Union Monsters because they lack the "one at a time" condition, allowing an "A Class" to be equipped with 2 or more such monsters, while they have the flexibility of them being unequipped to Special Summon them, or protect them from destruction, assets still taken from the Union Monsters.