Gravity

Gravity, Gravira, and Graviga are a series of magic that appear in  and Kingdom Hearts Chain of Memories. They utilize the "power of the stars", and are associated with the Lucid material. Gravity spells form a miniature event-horizon that crushes their target, depleting a percentage of their HP and rendering them temporarily defenseless to further attacks.

Kingdom Hearts
In Kingdom Hearts, Gravity is advanced magic that can be used by Sora and Donald. Gravity magic costs 1 MP to use.

Genie may cast Gravity as part of his Showtime ability.

After Kairi's rescue, enemies' resistance to Gravity is increased.

Gravity magic is required to lower floating treasure chests at Hollow Bastion.

Gravity magic can be used to lower a beehive into a hole in a log in the 100 Acre Wood, allowing Pooh to cross over it during the Pooh's Muddy Path mini-game.

Kingdom Hearts Chain of Memories
In Kingdom Hearts Chain of Memories, Gravity is a Magic Card that can be used by Sora.

The Genie Summon Card, Jack Skellington Friend Card, and their associated sleights can cast Gravity magic when used.

The Gravity card is required for the following sleights:

Kingdom Hearts
Sora and Donald learn Gravity by obtaining the power of stars. Obtaining additional power advances Gravity to Gravira and Graviga.

Sora and Donald obtain the power of stars:
 * After completing the Phil Cup.
 * After defeating Oogie's Manor.
 * After defeating Hades in the Hades Cup.



Kingdom Hearts Chain of Memories

 * Sora can obtain the Gravity card from an Agrabah Bounty.