Extraordinary is a feature of some Abilities which usually differentiates it from magical abilities. It is denoted by the symbol (ex).
From the Rules of Play:
(ex): for Extraordinary: This ability is not Magical in nature. It could represent poison from a vial or using a piece of twine to fix a broken arrow. An ability listed as (ex) which is defined as being an Enchantment in its ability definition generally behaves as an Enchantment but does not count towards the limit of Enchantments that may be worn by a player. See the definition of Enchantment under the section ‘Abilities, States, and Special Effects Defined' for more information.[1]
Ability Enchantments denoted as Extraordinary (ex) in the class description do not count towards enchantment limits or count for the purposes of Attuned, Essence Graft, or similar abilities. A player may not have more than one (ex) enchantment of the same name.[2]
Incantations listed as Extraordinary (ex) do not require a free hand. [3]
Special Effects granted to equipment are always Extraordinary. [4]
