Keyblade Masters

Keyblade Master is the title given to exceptional Keyblade wielders who pass the Mark of Mastery exam in the Kingdom Keymasters series. There are a total of five known Keyblade Masters: Master Jolnir, Master Eraqus, Master Xehanort, Aqua, and Riku. Currently, four of the six remain active: Master Jolnir, Aqua, Xehanort and Riku. Master Xehanort previously lost his memories, becoming the younger Xehanort, but was restored following the destruction of his Heartless and his Nobody. Commander's Keyblade was destroyed in battle, and Eraqus was slain by Master Xehanort.

The Keyblade Master, upon passing the Mark of Mastery exam, is given the choice to either travel to many worlds and explore his or her horizons, or to succeed his or her predecessor and take refuge in his or her own world to protect it from malevolent forces and later take on more apprentices.

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 * —About Keyblade Masters.

Powers and abilities
All Keyblade Masters share the ability to extract the hearts of themselves or others, this is shown when Master Xehanort extracts the hearts of Aurora and himself. They can also extract part of the heart as well, for instance, Xehanort extracts the darkness coming from Ventus's heart, and creates Vanitas.

Keyblade Masters also have the ability to perform the Keyblade Inheritance Ceremony, a trial in which a person is chosen to inherit the power of the Keyblade by clutching the Keyblade in their hand and allowing it to accept them. This is shown when Terra performs it on Riku, and when it is accidentally performed on Kairi when she grasps Aqua's Keyblade. Although, Terra does not have the title of Master, he is at the level of one, therefore he is able to perform this rite.

In addition to performing the Keyblade Inheritance Ceremony, Masters can conduct the Mark of Mastery exam upon potential Keyblade Masters. Although Yen Sid is a retired Master, he is still able to conduct the exam.

Also, Aqua is able to sense that the ceremony has been performed on Riku, although it is not known whether all Keyblade wielders can sense this, or if it is a Master's ability.