An Archetype is a group of cards with at least 1 defining Property.
Archetypes are often identified by a term appearing in all its members names. Support cards for the Archetype usually reference cards with that term in their name.
Archetypes are not always supported. They are not always identified by having a common term appearing in their names, such as the God Cards.
The concept of Archetypes is often used in the Manga and Anime series to define a character's personality, look, state of mind or style of play.