User blog comment:Pollux83/Beyond Light and Darkness, Chapter 10/@comment-31655597-20170812175114

Sorry, no over 9000 jokes in this story.

Here are a few ingredients for the crystals:

Dragon bone powder

Dragon horn powder

Dragon scales (dragons are very valuable suppliers of ingredients)

Mermaid tears

Nitre

Some gems and ores

Angel feather

Hellhound blood

Fairy powder (dried and pounded fairy wings; the pure ones, the corruptet are too strong)

Some parts of animals

And more ...