Is the ring of overclocking even real?

I killed over 5 hundred of fcking strays maybe more, I even made a mob grinder to kill them during the day, with advanced looting 3 and luck magnification 2, and EVERY SINGLE DROP were arrows, slowness arrows, bow, or cristals. not one single drop. is the drop 3% or 0.00000000003% 10 days in real life, 4 hours a day, looking for them and killing them, but not a single drop holy fck.
EDIT: I'm playing on dregora, no negative luck or even bad luck at all