Greenmote is only found in Greenmote Silo, a cave hidden beneath the Palace Grounds in New Sheoth. The Silo can only be accessed during the "Ritual of Mania" quest. Anytime after the quest, you will still be allowed to enter the silo, and pilfer as much Greenmote as you please at the risk of being caught by the guards, as entering the silo is still considered trespassing.
The one-minute effects of Greenmote Rapture are:
- Drain Strength, 10 points
- Drain Agility, 10 points
- Drain Intelligence, 10 points
- Fortify Speed, 10 points
- Fortify Endurance, 10 points
- Fortify Personality, 10 points
Note: Taking three doses of Greenmote at the same time will cause an overdose and instant death.