Ayy, didn't know I had to post here as well.
THC is the chemical found in cannabis that is responsible for most of its psychological effects. As we already know from reading the submission, the human body possesses cannabinoid receptors that are specifically designed to process cannabinoids such as THC. THC works by attaching itself to these receptors and activating them, affecting the person's memory, movements, concentration, and sensory and time perception.
Ichor, in Greek Mythology, is said to be the blood of the Gods which retains the qualities of their food and drink, Ambrosia and Nectar which you have named the two types of Ichor after. That's cool, keeping with the theme lol
The element itself, is an amber/gold colored viscous liquid that has a waxy look to it and is created through the combination of four elements ( Water, Earth, Wind, Fire ), being weak to Earth and Wind and strong to Water, Fire and Lightning. Separated into two types, Ambrosia ( associated with the Sativa strain and usually applied to the user ) and Nectar ( associated with the Indica strain and usually applied to the opponent ), each type causes varying affects to the person such as hallucinations, paranoia, temporary relief from pain, increased heart rate, headaches, etc.