Inflicting damage to yourself

[Darth Cryptic]

This is likely gonna sound weird, but is there any way to make an equipable injure the character wielding it? Just one to two points of damage every X seconds is what I'm thinking. I want to make it to simulate a Sith artifact leeching the life from a person. If there isn't any conceivable way to do it, what would you suggest be the best way to simulate this?

[Trench]

I've been wondering that as well, I need it for an equipable Nihilus mask I'm making.