The amulet has a passive effect that activates every 15 seconds and damages monsters in combat with the wearer for 200 to 500 life points, while healing the wearer for the same amount. The amulet will target the monster that last damaged the wearer or the monster the wearer last damaged (whichever was most recent), and any other nearby monsters (even if they aren't in combat with the wearer). The maximum the necklace can heal per activate is 1,200 life points. If the amulet was intended to do more damage than its target had left (e.g. the target had 240 life points, and the amulet rolled to hit a 500), then the amulet will still heal the full amount to its wearer.