Dark Aura

Dark Aura (ダークオーラ) is an ability which appears in Kingdom Hearts: Chain of Memories and Kingdom Hearts II. It has two forms. The first consists of Riku rapidly opening portals of darkness and rushing out of them at the opponent with his blade, then slamming the ground to summon a column of light that confuses the enemy. The second, used only in Kingdom Hearts II, consists of Riku firing orbs of darkness which stop the enemy's movement. In Kingdom Hearts II, it requires 2 AP to equip.

Kingdom Hearts: Chain of Memories

 * Riku learns Dark Aura by obtaining Dark Mode.

Kingdom Hearts II

 * Riku has Dark Aura as a default ability.

Kingdom Hearts
While possessed by Ansem, Seeker of Darkness, Riku uses the first form of Dark Aura as his strongest technique.

Kingdom Hearts 358/2 Days
During his final battle with Roxas at The World That Never Was, Riku uses the first form of Dark Aura, but does not have to enter Dark Mode.