Thunder

Thunder, Thundara, and Thundaga magic are attacks used by Sora, Donald, and other characters and enemies that utilize the element of Electricity. In Kingdom Hearts, Thunder was a more powerful and costly spell than Fire or Blizzard, summoning a barrage of lightning bolts from above to strike an enemy and any other enemies nearby. In Kingdom Hearts II, Thunder is more or less equal to the other attack spells, summoning a single lightning bolt to strike one enemy.

Acquiring

 * Kingdom Hearts
 * Thunder: Learned after completing Philoctetes.
 * Thundara: Upgraded after defeating the giant Ursula.
 * Thundaga: Upgraded after defeating Cerberus in the Hades Cup
 * Kingdom Hearts: Chain of Memories
 * Thunder: A Magic Card obtained after defeating Larxene for the first time.
 * Thundara: Stock 2 Thunder Cards.
 * Thundaga: Stock 3 Thunder Cards.
 * Kingdom Hearts II
 * Thunder: Defeat the Hydra (Olympus Coliseum)
 * Thundara: Upgraded after Defeat Storm Rider (Land of Dragons)
 * Thundaga: Upgraded after Defeat Groundshaker (Pride Lands)

Enemies that use Thunder Magic

 * Yellow Opera
 * Devastator
 * Bookmaster
 * Wizard
 * Ursula
 * Groundshaker
 * Larxene

Other Usage

 * In Kingdom Hearts, the Thunder terms are used to mark the ranks of the Blaster Gummi Blocks.
 * In Kingdom Hearts II, Thunder are used to mark the ranks of the laser-like Blaster Gummi Blocks.