The Nightwatcher, not knowing what either of these things are asks you to explain. After a long talk she creates these:
Christmas tree:
Tree with VERY sharp needles pointing out from it in all directions. It has decoration on it, little cremling shells pained in all colors
Roses:
Some VERY spiky flower,with a green stem and a white top that curls around in a nice patter
Your bane of choice is that the preferred food of whitespines is the Christmas tree. The Nightwatcher also liked the story of alice in wonderland's roses, so she siks a beheading loving queen who hates white roses on you!
I wish that @Arith Matic would change his profile picture to something less..."meme"