This could be a craftable necklace or found on loot and have basic properties such as, resistances, lower mana cost, and so on. The way it works, if it's a loot drop or an arty, you take it and put it on. The next thing that you hit with a melee attack is what sets what type it is. So, if you attack a daemon it becomes a daemon necklace of fangs. As you kill daemons, teeth or fangs are added that will slowly increase damage, hit chance, defense chance and weapon speed. So, maybe every thousand daemons a player would receive another fang. So, if you only hunt one or two things in the game, this necklace would make you more and more powerful against that foe, plus when people see how many fangs you have they know that you have killed many of this type. This item would work on bosses such as the dark father, medussa, and champ bosses but obviously would take alot longer to become really affective. This item should be character bonded so it only works for the character who initially used it.