Non-elemental

From Final Fantasy Wiki

Non-Elemental abilities and magic skills, such as Flare and Ultima, are those that do not have any elemental affiliation like Fire or Blizzard. Non-Elemental abilities and magic skills are recommended because they cannot be absorbed by units who absorb elemental attacks. The majority of attacks, including items, fall into this category in every Final Fantasy game, and as such, cannot be reduced or nullified by simply equipping a piece of equipment such as Flame Equipment or Tetra Elemental. Instead, most non-elemental attacks must be dealt with either by using the Defend or Row commands, or the spell Protect, against physical attacks, while for magic non-elemental attacks, it can only usually be dealt with by utilizing the spell Shell.