In Final Fantasy VII, there is an unnamed element hidden in the game code that was partially scrapped pre-release, including its own name. Few attacks actually use this element, and only one does that deals damage: the devastating Ultima Beam attack from Ultima Weapon. It is very possible to abuse this partial-deletion by placing the Elemental Materia linked to a non-elemental Materia (such as Restore) on your armor. If you do so, depending on the level of the Elemental Material, you will halve the damage from Ultima Beam, nullify it, or even absorb, taking a lot of difficulty out of this battle.