Most occurrences are on non-Japanese prints of cards where the card's name was established before the archetype was; the most common usages are on old "Archfiend" cards such as "Summoned Skull" and "Axe of Despair" for which the name is well-established and it would not be appropriate to rename the card.
On non-Japanese cards, archetype conditions are listed in parentheses at the start of the card text (but after Materials) on a separate line from the rest of the card text for all cards except non-Effect Monsters, on which they are listed at the bottom of the card description box. On Japanese cards, archetype conditions are listed at the start of the card text, but still as part of the main body and not in parentheses.
Because an archetype condition is not an effect, it is unaffected by cards such as "Skill Drain". It is also the only text to be printed in the primary card text of a Normal Monster that can affect gameplay in any way.
The condition is formatted as:
- (This card is always treated as a(n) "[archetype]" card.)
or if there is only support for monsters of that archetype:
- (This card is always treated as a(n) "[archetype]" monster.)
On Japanese cards, the condition is formatted as:
This type of condition was first seen in Absolute Powerforce on "Chimera the Flying Mythical Beast". While "Archfiend" cards without "Archfiend" in their name had long been listed on the official website and in rulebooks, the condition text was not added to them until Battle Pack 2: War of the Giants.
So far, archetype conditions have only been used to include cards in the "Phantom Beast", "Archfiend", "Utopia", "Noble Arms" and "Elemental HERO" archetypes. As there is only support for "Phantom Beast" monsters rather than "Phantom Beast" cards, the archetype condition used on "Chimera the Flying Mythical Beast" only includes it as a "Phantom Beast" monster, whereas other cards with archetype conditions are included as cards of that archetype.