2| Hire the mercenary in Twinblade's Camp, bring him to the chapel & sacrifice him at midnight.
3| The easiest way to know it's midnight, is because آپ pay the mercenary سونا every hour. Once your money bag pops up دکھانا آپ he's getting مزید gold, wait for it to disappear & talk to the man closest to the entrance of the chapel.
4| آپ know for sure you've got Skorm's Bow when the man says, "Your desire for my evil influence is gratifying. آپ will go far."
It's seriously as simple as that. Trust me, I've tested this method out several times just to make sure it wasn't some kind of weird game glitch. I don't think it is personally, because whenever I use this method it always works & I get it on the very first try every single time.
{By the way, I play it on the Xbox, so I'm not sure if it'll work the same if آپ play the PC version.}
