Regen

Regen is a passive ability featured in Kingdom Hearts: Chain of Memories, Kingdom Hearts Re:Chain of Memories, and Kingdom Hearts Birth by Sleep.

Kingdom Hearts: Chain of Memories

 * The Oogie Boogie card has "Regen" as its ability.

Kingdom Hearts Birth by Sleep

 * Regen is the second effect for the Cinderella D-Link.

Etymology
Regen is derived from the word 'regenerate'.