Sinister Squashling is the only thing I need for "Hallowed be Thy Name".
I'm not going to be able to get it because i'm 54 and I can't go do Headless Horseman to farm for it so I'm relying on Trick or Treating.
I'm getting seriously pissed off because I have been getting up in the middle of the night to Trick or Treat and all I get is tricked (last 5 times in a row) or candy/toothpicks (last 10+ times before that). They could at least give me a mask that I don't already have (I have gotten the same mask 3 times...) even though I don't need them for the achievement.