Regen is a status in Final Fantasy X. Regen restores a small amount of HP to the target at the start of any unit's turn in battle, and lasts until the target takes its tenth turn after receiving the status. The amount of HP restored is between 100 and a tenth of the unit's maximum HP, potentially breaking the upper damage limit of 99,999 when bestowed on an enemy with over 1 million HP.
Final Fantasy X Scenario Ultimania - Final Fantasy X Battle Ultimania - Final Fantasy X Ultimania Omega (Final Fantasy X International Ultimania) - Final Fantasy X HD Remaster Ultimania - Final Fantasy X BradyGames Official Strategy Guide - Final Fantasy X Piggyback The Official Strategy Guide