O (archetype)

If you were looking for the similarly named Archetype that means "Ocean Xyz", go here.

"O", short for and known as "Order" ( Ōdā) in the Japanese version, is an archetype of Xyz Monsters that are featured in Yu-Gi-Oh! ZEXAL - The Future. They are the primary Xyz Monsters used by the Astralians, the denizens of the, and are thus the counterparts of the "Chaos" Xyz Monsters used by their enemies, the s. Much like their "C" counterparts, "O" encompasses two sub-archetypes, "OXyz" and "Number O", which are explicitly supported by the support cards in the OCG and combined into one in the anime.

The process of Xyz Summoning "Order" monsters is known as Order Xyz Evolution, regardless of whether it was naturally or by a "Rank-Up-Magic" card, though the former variant is very rare. Much like "Chaos" monsters, "Order" monsters can be Xyz Summoned normally using 1 more Xyz Material than their original counterpart, but they must be of the corresponding Attribute (for the naturally-evolving "Number Os") or 1 Level higher (for the Rank-Up "Number Os" and all of the "OXyzs") than their base form.

To contrast the pinkish glow of "Chaos" monsters, "Order" monsters typically give off a light blue glow, much like the skin tone of a normal Astralian (or himself). This same blue color is used when Ranking-Up a Number into a "Number O", as the Number becomes an Overlay Streak of this color.

"Order" monsters carry the same restrictions as their "Chaos" counterparts when it comes to their effects: Monsters Summoned by a natural Order Xyz Evolution cannot activate their effects while the controller's Life Points are above a set value, while those Summoned by Rank-Up-Magic" Spell Cards have the second half their effect locked unless that monster's specific base counterpart is attached to it as Xyz Material.

The characteristic Rank-Up-Magic for this Archetype is "", which is retconned to specifically Summon "O" monsters rather than any Xyz Monsters. However, variants of this RUM now exist, the most notable being "Rank-Up-Magic Chaos Astral Force", which circumvents this restriction through the power of Chaos, albeit by making the card comparatively inferior.

The "New Order" Archetype would canonically not be part of this Archetype due to the way the translation is handled (treating "NO" as one entity rather than two), but in ZEXAL - The Future, all New Orders have an Archetype condition that treats them as "O" monsters, allowing them to be Summoned through the retconned "Astral Force". The "New Orders" are among the few "O" monsters to not suffer any of the above-listed drawbacks or restrictions.