Plasmatons are generally harmless and are not good soldiers. However, drawing and deeper reserves of psychic power, a person can assemble particles into something far deadlier than a Plasmaton, though it was still named as such. A temporary field of particles can also be created to trap a person.
The Xeraphin, using their psychic powers, were able to create Plasmatons, and through their power, the Master was able to summon Plasmatons for his servants. Because the Xeraphin's power was weak, Kalid was only able to either summon Plasmatons or trap someone in a Plasmaton field, requiring all the power he had to focus on only one thing.
A variant of the Plasmatons was used to terrorise Tegan Jovanka and Nyssa when they attempted to enter the Citadel.