Methanphetamine should be considered the most dangerous thing in the drug market for regular people to just pick up and use.
When regular people smoke meth for 6 months to 1 year of daily use they essentially will rip their body into an open energy vessel, people can't any longer use the restroom, because the body will produce so much internal energy that it will dissolve in the gut.
As you smoke, a film of meth grows around your nervous system and consciousness. Eternals have practiced in the past, a practice of plucking put somebody from their body and letting them float to heaven before their time.
Some people smoke for years, without noticing schizophrenia, or some of the other changes you go through. When you come down, a year later, you will finally realize the damage that you have done to your body.
The craziest thing about being a schizophrenic, and having a ripped soul, is that your mind is too receptive to noise, and your mind can seem like it's talking to you receptive to all sound channels in the nearby area, when you pick up sound signals sometimes interdimensional voices can broadcast to you.
The Kingdom has decided against meth ascension, because
A) Everyone is filled in & the world is no longer in need of new recruits
B) Schizophrenia is irreversible
C) Meth is very dangerous