Blizzard Boost (ブリザドアップ BurizadoAppu, lit. "Blizzard Up") 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 1 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.
Learning Blizzard Boost
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 type E or type F Command recipe through Command Melding, either randomly or by applying a Shimmering Crystal.