Magnetic ooze is alive in the way that a flame is. It scatters about a dungeon, its individual particles slowly attaining a balance between all metal objects. When a new source of metal it's introduced to its environment, the individual particles are unbalanced and attracted. Sometimes the clinging particles go unnoticed until significant build up is obvious but, en mass, the particles form a grey goo that stalks and envelops anything metal. Instinct: To creep toward metal

• Envelop metal
• Encrust their hinges and mechanisms