Damage Control

Damage Control (Crisis Half) is an ability that only appears in Kingdom Hearts II Final Mix and Kingdom Hearts 358/2 Days. In Kingdom Hearts 358/2 Days, it can be activated through the abilities of Roxas's and Xion's Rejection of Fate+, Kingdom Key+ and their Two Become One. Also in mission mode it is available for Roxas's Oathkeeper/Oblivion. In Kingdom Hearts II Final Mix, it can be used through the abilities of Goofy's Save the King+ and Donald's Centurion+. Oddly, this ability can only be used through upgraded weapons, as shown by the "+" at the end of their names.

Crisis Half makes you take ½ damage when you’re in Critical HP. You can get it early by defeating Absent Silhouette Zexion.