One HP
One HP (HP 1) is an ability that appears in Kingdom Hearts 358/2 Days. It reduces the user's maximum HP to 1, regardless of level.
MechanicsEdit
In Kingdom Hearts 358/2 Days, One HP is an equipment ability. The user may survive a single hit with this ability equipped only if Auto-Life is active. One HP can be useful for gaining immediate access to the user's Limit Break.