

With most of the Union leaders defeated, Darkness is coaxed by Brain into revealing its true plan: infection. Brain questions Darkness before raising his Keyblade agaist it alongside Ephemer and Skuld. Lauriam attacks, enraged at Darkness for killing his sister Strelitzia, but he is easily defeated in his weakened state. The Darkness lurking in Ventus's heart exposes itself to the Union leaders. The Darkness inside Ventus reveals itself.

Darkness then disguises itself as Ava and instructs Ventus on his new role. Right before the start of the Keyblade War, one Darkness takes Ventus as its vessel and strikes down Strelitzia, stealing her Rulebook and giving Ventus her spot as a new Union leader.
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Following the Keyblade War, the Foretellers, Luxu, and the Master of the Masters became hosts for the strongest seven Darknesses, all according to the Master of Master's plan. This caused their hearts to harbor dark emotions, rendering them perfect vessels for Darkness. Even so, Darkness views the Master of Masters as an "old friend".Īs part of his plan to defeat Darkness, the Master of Masters orchestrated the Keyblade War by subtly manipulating his apprentices, breeding distrust and anger among them. Darkness would also have conversations with the Master of Masters, but they were unable to understand each other's thoughts and positions. Because of this, Darkness learned that Ventus would harbor Darkness in the future. When the Master of Masters was composing the Book of Prophecies with knowledge passed to him via the Gazing Eye, Darkness watched over his shoulder, reading the passages as they were entered. The Master of Masters and Darkness discuss the future.
