Blizzard Boost

Blizzard Boost (ブリザドアップ) is an ability that appears in Kingdom Hearts: Chain of Memories, Kingdom Hearts II, and Kingdom Hearts Birth by Sleep. It increases the damage done by Blizzard-based attacks. In Kingdom Hearts: Chain of Memories, "Blizzard Boost" is activated by the Blue Rhapsody card, costs 20 CP to add to your deck, and lasts for one reload, while in Kingdom Hearts II, it requires 4 AP to equip, and in Kingdom Hearts Birth by Sleep, up to three copies of it can be equipped.

Kingdom Hearts: Chain of Memories and Kingdom Hearts Re:Chain of Memories

 * The Blue Rhapsody card has "Blizzard Boost" as its ability.

Kingdom Hearts II

 * Sora learns Blizzard Boost at level 32 with the Dream Rod, 39 with the Dream Sword, and 59 with the Dream Shield.
 * Donald learns Blizzard Boost after defeating Demyx at Hollow Bastion.
 * Jack Skellington has Blizzard Boost as a default ability.
 * The Mysterious Abyss has Blizzard Boost as its Equipment Ability.

Kingdom Hearts II Final Mix

 * Sora learns Blizzard Boost at level 32 with the Dream Rod, 39 with the Dream Sword, and 59 with the Dream Shield.
 * Donald learns Blizzard Boost after defeating Demyx at Hollow Bastion.
 * Jack Skellington has Blizzard Boost as a default ability.
 * The Mysterious Abyss has Blizzard Boost as its Equipment Ability.
 * The Shaman's Relic has Blizzard Boost as its Equipment Ability.

Kingdom Hearts Birth by Sleep

 * Blizzard Boost can be attached to a or  Command recipe through Command Melding, either randomly or by applying a Shimmering Crystal.