Force Shield

Force Shield is a recurring shield in the series, that is often one of the more powerful shields. While it usually has mediocre defenses, it makes up for it usually with its abilities, which usually deal with halving elemental damage. Oftentimes it is an universal shield that anyone can equip.

Final Fantasy V
Appearing only in the Advance remake, the Force Shield is the reward for defeating Omega Mk.II in the Sealed Temple. It grants +5 Weight, -5 Speed, and a mere +15 Defense and +10 Evasion, but halves the damage of all elemental attacks.

Final Fantasy VI
Force Shield is a universal shield that can be equipped by everyone except Umaro. While it provides no defenses, it provides a whopping +70 Magic Defense and +50% Evasion. Additionally, it halves damage from Fire, Ice, Lightning, Earth, Wind, and Water elemental attacks, grants Auto-Shell to the user, and teaches Shell at a x5 rate. It can be obtained either by finding it in Kefka's Tower, stealing them from Glutturn (Ether), winning it from Ice Dragon, or by winning it in the Dragon's Neck Coliseum by betting the Paladin Shield.

Dissidia Final Fantasy
Force Shield is a level 43 shield that provides +32 Defense.