Magic Boost

Magic Boost is an item that permanently boosts a character's Magic stat by 1 point. It can only be used in the Items Menu.

Kingdom Hearts II Final Mix

 * Magic Boost: Axel's Replica Data, Roxas' Replica Data

Kingdom Hearts II

 * Magic Boost: Obtain 40 different material types; obtain all Serenity materials; chest at Kanga's House.

Kingdom Hearts II Final Mix

 * Magic Boost: Obtain 40 different material types; obtain all Serenity materials; chest at Kanga's House; chest at the Mineshaft

Kingdom Hearts II
The Skill Recipe can be found in a chest in Ansem's Study. The Magic Boost is a rank S synthesis item, and is an upgrade of the AP Boost recipe.
 * 1 Mythril Gem
 * 3 Power Crystal
 * 3 Dark Crystal
 * 3 Frost Crystal
 * 1 Serenity Crystal

Kingdom Hearts III
Magic Boost can be synthesized once 22 different synthesis materials are obtained.
 * 5 Wellspring Gem
 * 2 Blazing Crystal
 * 2 Frost Crystal
 * 2 Lightning Crystal
 * 1 Hungry Crystal