Psychic clay

Psychic clay is a fictional mineral featured in comic books published by Marvel Comics. It is part of the mainstream Marvel Universe, as well as related media, and is associated with the Fantastic Four line of comic book titles. Psychic clay was developed by Phillip Masters, also known as the Puppet Master. By molding the clay into a known figure, he then gains the power to mentally control their actions. This bizarre item has become a thorn in the sides of the Fantastic Four on many occasions.