In Kingdom Hearts, Ragnarok is a Special Ability. When close to an airborne enemy, selecting the Ragnarok command will cause Sora to automatically jump up to the enemy and deliver an aerial attack combo, after which he will hover while charging energy. Unlike Sonic Blade or Ars Arcanum, it requires no timing to execute the finisher, Impact; however, the longer Sora charges before using Impact, the more projectiles are fired and the heavier the damage, with the optimal time being immediately after the Keyblade releases a circular burst of light. The projectiles home in on enemies after being fired, while Sora can move freely. Waiting too long to use Impact causes the energy to dissipate without releasing the projectiles. It costs 4 AP to equip and 3 MP to use. Sora is invincible during the initial weapon combo, but when Sora is charging the projectiles, he is left vulnerable to damage.
In Kingdom Hearts: Chain of Memories, Ragnarok is an attack sleight. Pressing , in Kingdom Hearts Re:Chain of Memories, fires the projectiles sooner, although there is no difference in damage. Waiting too long causes Sora to fire the projectiles automatically. In Re:Chain of Memories, the rays home in on enemies. The initial weapon combo from the Kingdom Hearts version of Ragnarok is not executed. The card combination for Ragnarok is:
In Kingdom Hearts II Final Mix, Ragnarok is an action ability available while in Limit Form, either from the Limit menu or by pressing in the Shortcut menu. Using Ragnarok will trigger an aerial attack combo, followed by Sora charging energy while in the air. Selecting one of the Reaction Commands that appear, Shoot, Impact, or Giga Impact, will fire the charged projectiles. Waiting until Giga Impact before pressing will fire the most rays. The projectiles home in on enemies.
In Kingdom Hearts 358/2 Days, Ragnarok is Sora's Limit Break. The Final Limit version fires larger, faster shots that lose their homing ability but are propelled together in a drilling formation, piercing through enemy guards. For both, allowing it to charge before pressing will fire a larger number of projectiles.
In Kingdom Hearts Birth by Sleep, Ragnarok is a Shotlock that has a maximum level of 4 and max lock of 16. Once the attack has begun, the player can perform extra attacks by pressing at the right time to fire additional projectiles.
 Learning Ragnarok
 Kingdom Hearts
 Kingdom Hearts: Chain of Memories
 Kingdom Hearts Re:Chain of Memories
 Kingdom Hearts II Final Mix
 Kingdom Hearts 358/2 Days
 Kingdom Hearts Birth by Sleep
 Kingdom Hearts 3D: Dream Drop Distance
 Other appearances
 Kingdom Hearts 358/2 Days
Xion in her second form can use Ragnarok, where the streams of shot fires are long lasting and can chase the player around until its end, it can deplete the player's HP to the Alarm Zone, if not bringing the HP to zero. Ragnarok is considered a Nil-based attack in this game, it ignores defense completely.
Ragnarök is an event in Norse mythology that is similar to the Apocalypse. It is an event that is set off by the death of the god Balder, which was orchestrated by Loki. The Ragnarok was a final clash of all the major entities of Norse mythology. This caused all of the human spirits up in Valhalla to come down for the final battle. This bloody encounter ebbs with the destruction of the universe and Balder along with a little handful of entities that are put in the bodies of children and only contain memories of the world before Ragnarok. Those entities would become mortal.