Using pre-industrial era technology how does an intelligent creature create the perfect illusion that reproduces vision,sound and touch sensations and make them seem perfectly ''real'' from the viewpoint of the victim ?
This creature wants to make the illusion of summoning a giant red,horned demon with wings and spikes all over the body that chases the victim.
The victim has to not only to see,hear and feel the demon but also sense pain if the demon illusion attacks.
The victim doesn't have to be completely disconnected from reality i.e nothing else must change and the victim is awake it just happens to see and feel a giant red demon that isn't there.
The illusionist has to have at least a partial control of the illusion, the illusionist ability can be part of it's own biology or simply the effect of drugs and other tools but nothing too advanced.
like the effect of the plant Datura mixed with other toxins that can create incredibly realistic nightmares while the person is still awake and conscious, the illusions created by this mixture of toxins is incredibly realistic and horrifying and some times can kill.I want something similar or even more powerful but that can be controlled by the illusionist.