These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Elf Blood
Fetish Fuel/Nightmare Fuel: One of TKO's more complex spells involves stripping naked and drawing arcane shapes on her skin in black ink. But after that, she murders a goat, bathes in its blood, and stabs a poppet with a photograph of her sister's face on it, using a sacrificial knife.