---Ingredients---
Ancient Obsidian dagger
-- Egypt
Water from an ancient cave
-- Japan
Sand that frequently falls under shadow
-- Peru
Draconic blood
-- Mexico (Praurn)

---Other Ingredients
---
Tobacco (Egypt)
Owl feathers (Japan)
Poppy (Egypt)
Antimony (Japan)
Saffron (Egypt)
Peyote
 (Peru)

---Equipment---
Cauldron (Mexico)
Wood (Mexico)
Matches/lighter (Rebecca's Handbag)
Morter and Pestle (Mexico)

---Instructions---
1) Start a fire going underneath the cauldron
2) Put the herbs into the morter, then grind them to a powder with the pestle, before mixing it in with the sand
3) Once the fire has started going properly, pour the ground contents of the morter into the cauldron, along with the antimony, before pouring the cave water into it
4) Mix the ground powder and the water together using the obsidian knife until it forms a dark, earthy-brown colour and starts emitting a fresh, damp smell
5) Use the obsidian knife to draw blood from a dragon, letting at least a pint of blood fall into the water, before stirring that in also, then depositing the obsidian knife into the mixture

This must be done in the light of the target dragon's essence (the moon), in a place sacred to the essence (a Temple of the Moon)