Hero's Shield

The Hero's Shield, also known as the Paladin Shield, is a recurring shield in the series. It is usually an high-rank armor that grants protection against status ailments and elemental damage or bonuses to stats.

Final Fantasy
The Hero's Shield is the best shield in the game, available only on the Dawn of Souls and 20th Anniversary versions. It grants protection against all statuses and elements to the wearer, and also provides +16 Defense and +40 Evasion. It is found in the Lifespring Grotto.

Final Fantasy III
The Heroic Shield is a mediocre shield that, like all shields, protects against certain status ailments and also grants a bonus of 1 to all stats.

Final Fantasy IV
The Hero's Shield is the best shield in the game and is only available on the Advance remake. It is dropped by the superboss Brachioraidos and grants absorption of all elements and a bonus of 15 to all stats. It is also the only universal shield in the game, equippable by anyone.

Final Fantasy IV: The After Years
The Hero's Shield is the best shield in the game and is only obtainable after defeating Omega in the Depths. It provides +10 Defense and Magic Defense, 10% Magic Evasion, 45% Evasion, and +5 to all other stats.

Final Fantasy VI
The Paladin Shield is the best shield in this game, with a Defense power only lower than the Tortoise Shield. It absorbs fire, ice, lightning, and holy-elemental damage and nullifies poison, wind, earth, and water-elemental damage. It also teaches Ultima at a rate of 1% per Ability Point, the only other method of learning Ultima besides the Ragnarok Esper. Paladin Shield can only be obtained by "uncursing" the Cursed Shield, which is done by equipping it for 256 battles. Cursed Shield is found in Narshe in the World of Ruin.

Final Fantasy X
Any of Tidus's shields can become the Paladin Shield if it has all the four elemental "Proof" abilities.