Hallcyon is a fast-acting topical poison.
Marlene used it for various assassination operations.
Characteristics and Symptoms of poisoning[]
Hallcyon has a distinctive smell and is very effective, requiring only one touch of the poison on the target's skin. The poison liquefies the pleural lining of a person's lungs. The person drowns without ever being near water.[1]
Treatment[]
An antidote is available for this poison.