Dream of

I was given the task to protect some sort of artefacts that a villain needed to change their fate, but not in a good way. Some of the other people got given the same task before me but they ended up with a strange tattoo appearing on their face all over and it was glowing on the forehead and on the back of their head all with similar patterns then they straight after went crazy and got killed. I was in what seemed to be an underground city. I was just getting ready to go out to eat something when I noticed the tattoos glowing on one of the guys who was protecting the precious something. I went to get it as (apparently in the dream) I was the only one the tattoo wouldn't harm or drive crazy.