Guardian's Charm
From EZ Server Wiki
The Guardian's Charm converts melee damage into heals. It can be combined with the other 3 charms in a magic box when all 4 are level 50 to make an Ultimate Charm.
TIP - It would be wise to keep Guardian Charm level 50 on your Warrior until level 73 then merge them into Ultimate Charm. That way you get full benefits out of it by making big pulls.