the grim reaper

i dreamed last night that i was in some kind of school and this grim reaper figure would come in and if he was looking for you then there was seemingly nothing you could do except if you had this particular mask, if you put in over your face, then you would become invisible to him and he would go away for a while. then i saw some brave soul who was going to be attacked by the reaper and he acted as if the reaper didnt exist or have any power over him and when the reaper tried thrusting a knife into this guys (dark medium length curly hair with a blue and white collared shirt, like my orange one, only short sleeves) back it just disappeared and then the reaper also disappeared when he realized he was powerless against this guy. that gave me courage.