With the enhanced Elysium Vital Research you will consume the Natre's energy for 1 hour recovering your Vitality.
This buff last for 24 hours and renews every hour. It will remain upon dying, entering an instance zone, dual class changing and participating in the Olympiad and the Ceremony of Chaos.
It will be deleted, however, if you are dead at the moment it renews. The buff is available to worthy warriors of Lv. 105 and higher once a day per account (resets every day at 06:30).