Legendary Shield

The Legendary Shield is one of four Legendary Weapons within Raphtalia's World. The current wielder is Naofumi Iwatani.

Overview
The Legendary Shield, also known as the Shield Spirit of the Legendary Weapon. The spirit is from another world prior to being summoned to another world alongside with it's chosen Candidate, the Legendary Shield is one of four Legendary Weapons present in the world of which Naofumi currently resides in. The candidates of the weapon have been given the title of Shield Hero, whom they are generally addressed as so by the locals.

The current candidate of the Legendary Shield is Naofumi Iwatani. He was selected by the Shield Spirit as a first-choice candidate, which meant prior to being summoned he had the full potential of a hero without any of the characteristic faults that backup candidates possessed when initially summoned.

Each of the Legendary weapons also has two primary vassal weapons that work in tangent with them. In the case of the Shield its two primary vassals are the Vassal Claw and the Vassal Hammer. These three weapons work in balance where the Legendary Shield would be strong against the slashing of the Vassal Claw but relatively weak against the impact damage of the Vassal Hammer

Power-up Method
As a Legendary Weapon, the Legendary Shield has more than one power-up method. As of Volume 19, three of the four power-up methods are known. This consists of 1 core/passive method and 2 active power-up methods. Unlike other Legendary weapons of Raphtalia's World, the power-up methods of the Shield were hidden by an unknown force. Naofumi found these power-up methods on a tablet in Q'ten Lo.


 * Sharing (core): Share the power-up methods from other legendary weapons and vassal weapons. While this works without knowing the power-up method, knowing that this is the Shield's power-up method greatly magnifies the effect of shared power-up methods.
 * Trust: Trusting and being trusted leads to increased abilities.
 * Energy Boost: The heroes have energy called "EP" that they draw out automatically as power from the weapons, and this is always active. Assigning this energy to skills will allow more powerful skills to be used. This power was replicated through manipulating life force in Hengen Muso. 
 * Unknown Power-up Method: The last power-up method for the shield is unknown.

Anime Original List

 * Inter-Dimensional Corpse Eater Monster Shield
 * Rinobi Shield
 * Resug Shield
 * Inter-Dimensional Black Shadow Wolf Shield
 * Inter-Dimensional Dark Condor Shield
 * Chimera (Meat, Bone & Leather) Shield
 * Zombie Dragon (Meat, Bone, Leather & Heart) Shield and Zombie Dragon Shield
 * Tyrant Dragon Meat Shield
 * Tyrant Dragon Heart Shield
 * Filolial (Meat, Bone, Feather & Nail) Shield, Filolial Shield, and Filolial Queen Shield

List of Shield Abilities
As various different types of shield are unlocked, various Equip and Special Effects as well as skills are unlocked.

Trivia

 * Since travelling to the ancient past, when the Shield/Bow and Sword/Spear worlds were separate, the power-up methods from the Legendary Sword and Legendary Spear were removed from the Legendary Shield. The mastery level and rarity of the shields were mistakenly applied in Light Novel Volume 21.