Thinking ferro putty

This smart putty (silver-coloured) contains numerous ferromagnetic micro particles.

If you move the putty towards a strong magnet, such as the colossus, it will attract the putty.

If you turn the magnet, it repels the putty until the iron particles in the putty have rearranged.

Then, the putty moves once again towards the magnet and starts to engulf it.

Shortly thereafter it has devoured the magnet.

The bumps that become visible on the surface of the putty illustrate the magnetic field lines, which become more and more pronounced with time.