Aegis Chain

Aegis Chain (イージスチェーン) is an armor from Kingdom Hearts II. A moderately powerful armor that can be obtained in the early part of the game, it can be considered an upgrade of the Abas Chain, and is the first armor in the game to provide protection from all four types of Magic. It is also the most expensive armor available in the game.

Etymology
Aegis is the Greek word for "shield".