There is a particular ritual and it does involve a forest. Any forest with the right ambiance really… anyway, you have to find a rich person and exsanguinate them in said forest on the night of a full moon with a semi-cloudless sky. Well, it’s not strictly necessary, but just helps with the ambiance you know. Also, the richer the person the better. Particularly if they are the commanding executive officer of a large corporation with a track record of labour rights violations and operate with complete disregard/contempt for environmental protection.

*Bonus points for old melted candles, mystical geometric sketches drawn with bone chalk/represented with bones, etc. and hoods and long robes. The ambiance is actually pretty important.