Plasmer was about a shapeshifting, artificial lifeform created by Doctor Oonagh Mullarkey.
Dr. Mullarkey used both science and magic to separate the good and evil parts of her personality as a means of increasing her abilities.
The good parts of her were placed in a formless protoplasm that developed a life of its own, and became the superhero Plasmer.
Plasmer was the subject of a Marvel lawsuit against Defiant Comics' Plasm due to alleged similarities in name.
Defiant changed the name to Warriors of Plasm but went bankrupt soon after due to the legal costs.