What I have quested so far:

Neck Bow + Pumpkin Pot + Spider on a String + Ruff + Yuni Head Horn + Harpy Legs + Halloween Snowman Figurine + Pharaoh Staff

What I still need to quest for:

Stitches Stamp
Straight Bangs Hair Extension
Skull Skirt
Cracked Skin
See Through Skirt
Gravestone Plushie
5 x Bat Book