Keyblade (KHS)

&nbsp The Keyblade is a recurring weapon and often the main source of power for the protagonist in the Kingdom Hearts series. In Kingdom Hearts: Sinister, the Keyblade takes a major step away from what has been previously canon and features several original and off-beat variations.

Single-Chain: Virtue Keys/Sin Keys
The first original Keyblades seen in Kingdom Hearts: Sinister are of a competely different type than previously seen before. The the Sinister universe, Keyblades are not only differentated based on their alignment (light, dark, in-between and possibly nothingness) but also on their distinct values. The Keyblades in Kingdom Hearts: Sinister are divided into main categories: Virtue Keys, symbolizing light, and Sin Keys, symbolizing dark. The different values each key represents determines on their alignment; the Keyblade of forgiveness, Saving Jane, is for example a Virtue Key.

Unlike what is currently known about previous Keyblades, the new Keyblades actually also share some qualities with Zanpakuto from Bleach: while each does not have their own resident spirit that is fully sentient and in some cases smarter than a human, Sinister Keyblades have some degree of sentiency that could be described as instinct. It is this quality that many scholars from the Southern Kingdom of Terra Nox (where the general public is aware of the weapons; unlike in the Northern Kingdoms) believe to be the cause of the dissapearance of the ultimate Virtue Key, the Ultimate Order, due to the death of its wielder at the hands of the wielder of the ultimate Sin Key, the Regard Entropy; they have come to think it has disguised itself in some way.

Double-Chain: Grace Keys/Vice Keys
Although not much is known about double-chained Keyblades, ancient texts discovered during excavations have revealed their existence and possible means of their creation. According to an ancient alchemy lexicon, a double-chained Keyblade, known as either a Grace Key or a Vice Key depending on alignment, can be created by fusing together two other Keyblades, either of single-chain or double-chain. Grace Keys and Vice Keys are far more powerful than their single-chained counterparts, and possess upgraded abilities. The alignment of a double-chain Keyblade is not determined by the Keyblades fused, for example fusing two Sin Keys would not necessarily mean a Vice Key is created; rather, the intention of the fuser is literally key to the force the double-chain Keyblade is aligned to. It is unknown what happens to the inherent "souls" of the fused Keyblades upon fusing.

Currently the only known double-chained Keyblade that is or has been in existence is the X-Blade.