Cannabinolhydrotetra

You infuse a handful of herbs harvested from a magical field, near Oberrixxingen, or from a bard named Barde, or from a druid named Thoromir. 
These now magical herbs, give: 

- Some of the short-term physical effects of Cannabinolhydrotetra use include increased heart rate, dry mouth, reddening of the eyes (congestion of the conjuntival blood vessels), a reduction in intra-ocular pressure, muscle relaxation and a sensation of cold or hot hands and feet.

- In other words, if you use it in addition to a short rest your rest takes double the time, but is better. You heal additional HPs per Hit Dice used, determined by the quality of the Cannabinolhydrotetra.

- CHT temporarily suppresses the effects of exhaustion completly. After the high, the effects come back one level worse. They surpress for 1 hour, but you can then smoke some more.

- CHT gives you disadvantage or advantage against being frightened for 10 mins multiplied by the quality, depending on a d2. 1 = disadvantage. 

- CHT gives you temporary HP determined by the quality of the Cannabinolhydrotetra, these stay for 1 hour. Temporary HPs gained at a short rest with CHT stay for the rest of the day.

-CHT gives you Wisdom +2, Intelligence -1 and Dexterity -1, for 10 mins multiplied by the quality of the CHT.